| 释义 |
necessary
nec·es·sar·y N0043800 (nĕs′ĭ-sĕr′ē)adj.1. Needed or required: a contract complete with the necessary signatures; conditions necessary to life. See Synonyms at indispensable.2. a. Unavoidably determined by prior conditions or circumstances; inevitable: the necessary results of overindulgence.b. Logically inevitable: a necessary conclusion.3. Required by obligation, compulsion, or convention: made the necessary apologies.n. pl. nec·es·sar·ies Something indispensable.
[Middle English necessarie, from Old French necessaire, from Latin necessārius, from necesse; see ked- in Indo-European roots.]necessary (ˈnɛsɪsərɪ) adj1. needed to achieve a certain desired effect or result; required2. resulting from necessity; inevitable: the necessary consequences of your action. 3. (Logic) logic a. (of a statement, formula, etc) true under all interpretations or in all possible circumstancesb. (of a proposition) determined to be true by its meaning, so that its denial would be self-contradictoryc. (of a property) essential, so that without it its subject would not be the entity it isd. (of an inference) always yielding a true conclusion when its premises are true; valide. (of a condition) entailed by the truth of some statement or the obtaining of some state of affairs. Compare sufficient24. (Philosophy) philosophy (in a nonlogical sense) expressing a law of nature, so that if it is in this sense necessary that all As are B, even although it is not contradictory to conceive of an A which is not B, we are licensed to infer that if something were an A it would have to be B5. rare compelled, as by necessity or law; not freen6. the necessary informal the money required for a particular purpose7. do the necessary informal to do something that is necessary in a particular situation[C14: from Latin necessārius indispensable, from necesse unavoidable]nec•es•sar•y (ˈnɛs əˌsɛr i)
adj., n., pl. -sar•ies. adj. 1. essential, indispensable, or requisite: a necessary part of the motor. 2. happening or existing by necessity; unavoidable: a necessary change in our plans. 3. acting or proceeding from compulsion or necessity; involuntary. 4. Logic. a. (of a proposition) such that a denial of it involves a self-contradiction. b. (of an inference or argument) such that its conclusion cannot be false if its supporting premises are true. c. (of a condition) such that it must exist if a given event is to occur or a given thing is to exist. Compare sufficient (def. 2). n. 5. something necessary or requisite; necessity. 6. Chiefly New Eng. a privy or toilet. [1300–50; Middle English < Latin necessārius unavoidable, inevitable, needful] nec′es•sar`i•ness, n. syn: necessary, requisite, indispensable, essential indicate something that cannot be done without. necessary refers to something needed for existence, for proper functioning, or for a particular purpose: Food is necessary for life. Sugar is a necessary ingredient in this recipe. requisite refers to something required for a particular purpose or by particular circumstances: She has the requisite qualifications for the job. indispensable means absolutely necessary to achieve a particular purpose or to complete or perfect a unit: He made himself indispensable in the laboratory. essential refers to something that is part of the basic nature or character of a thing and is vital to its existence or functioning: Water is essential to life. necessary1. used with an infinitiveIf it is necessary to do a particular thing, that thing must be done. It is necessary to act fast.It is necessary to examine the patient carefully.2. used with 'for'You can say that it is necessary for someone to do something. It was necessary for me to keep active and not think about Sally.It is necessary for management and staff to work together positively.Be Careful!
If you use necessary in sentences like these, the subject must be it. Don't say, for example, 'She was necessary to make several calls'. Say 'It was necessary for her to make several calls'. However, in conversation and in less formal writing, people normally say 'She had to make several calls'. See mustIf one thing is necessary for another, the second thing can only happen or exist if the first one happens or exists. Total rest is necessary for the muscle to repair itself.Thesaurus| Noun | 1. | necessary - anything indispensable; "food and shelter are necessities of life"; "the essentials of the good life"; "allow farmers to buy their requirements under favorable conditions"; "a place where the requisites of water fuel and fodder can be obtained"essential, requisite, necessity, requirementthing - a separate and self-contained entitydesideratum - something desired as a necessity; "the desiderata for a vacation are time and money"must - a necessary or essential thing; "seat belts are an absolute must"need, want - anything that is necessary but lacking; "he had sufficient means to meet his simple needs"; "I tried to supply his wants" | | Adj. | 1. | necessary - absolutely essentialobligatory - morally or legally constraining or binding; "attendance is obligatory"; "an obligatory contribution"essential - basic and fundamental; "the essential feature"indispensable - not to be dispensed with; essential; "foods indispensable to good nutrition"unnecessary, unneeded - not necessary | | 2. | necessary - unavoidably determined by prior circumstances; "the necessary consequences of one's actions"inevitable - incapable of being avoided or prevented; "the inevitable result" |
necessaryadjective1. needed, demanded, required, called for, essential, vital, compulsory, incumbent, mandatory, imperative, indispensable, obligatory, requisite, de rigueur (French), of the essence, needful Is your journey really necessary? Please make all the necessary arrangements.
needed unnecessary, superfluous, expendable, dispensable, nonessential, inessential2. inevitable, sure, certain, unavoidable, inescapable Wastage was no doubt a necessary consequence of war.
inevitable avoidable, unnecessarythe necessary (Informal) money, means, funds, capital, cash, finances, resources, dough (informal), the readies (informal), dosh (Brit. informal), the wherewithal, wonga (slang) I could always count on her if I was a bit short of the necessary.necessaryadjective1. Incapable of being dispensed with:essential, indispensable, needful, required, requisite.2. Imposed on one by authority, command, or convention:compulsory, imperative, mandatory, obligatory, required, requisite.Translationsnecessary (ˈnesisəri) adjective needed; essential. Is it necessary to sign one's name?; I shall do all that is necessary. 必要的，需要的 必要的，必需的 ˌnecesˈsarily (-ˈse-) adverb 必要地 必要地necessitate (niˈsesiteit) verb to make necessary. Re-building the castle would necessitate spending a lot of money. 使成為必需 使成为必需necessity (niˈsesəti) – plural neˈcessities – noun something needed or essential. Food is one of the necessities of life. 必需品 必需品necessary
necessary evilSomething bad that must exist or occur in order for something good to happen. These days, student loans are a necessary evil in order to get an education that leads to a well-paying job. Some view dictators as a necessary evil who keep the region stable by suppressing more radical elements.See also: evil, necessarydeem it necessaryTo determine that something is necessary. I didn't deem it necessary to give the boys detention because having their shirts untucked isn't a very serious infraction.See also: necessarythe necessary1. The funds that are necessary for or to do something. We're hoping outside investors will be able to provide the necessary to get our company up and running.2. That which is required, necessary, or mandatory. A: "I know you're sure that the body we recovered belongs to the suspect, but we still need a positive ID from his next of kin." B: "OK, I'll contact his wife to come in and do the necessary."3. euphemism Urination or defecation. This is the last rest stop for the next four hours, so anyone who needs to do the necessary had better do it now!4. obsolete euphemism A toilet or outhouse. Back when I was growing up, nothing was worse than having to go out to the necessary in the middle of the night by yourself.See also: necessaryif God did not exist, it would be necessary to invent HimA sentiment expressed by 18th-century French philosopher Voltaire that emphasizes the human need to believe in a divine being. People can't help it—they need something bigger than themselves to believe in, so if God did not exist, it would be necessary to invent Him.See also: did, god, if, invent, necessary, notdeem it (to be) necessary and deem that it is necessaryto decide that something is necessary. Mary deemed that it was necessary to leave town that night. Lisa deemed it necessary to go home.See also: necessaryIf God did not exist, it would be necessary to invent Him.Prov. People need a deity to worship. (This is an English translation of a quote from Voltaire. It is often parodied, using a person's name instead of God and implying that the person is somehow necessary.) The atheist tried to convince Jerry that God does not exist, and that people should not waste their time worshiping Him. "But you can't stop people from worshiping God," Jerry replied. "If God did not exist, it would be necessary to invent Him." The unscrupulous mayor was such a convenient scapegoat for the city's problems that if she had not existed, it would have been necessary to invent her.See also: did, god, if, invent, necessary, nota necessary evil COMMON If you describe something as a necessary evil, you mean that although it is unpleasant, it is needed. He viewed war as a necessary evil. Managers sometimes think that training is a necessary evil that has to be done but is too expensive.See also: evil, necessarya necessary evil something that is undesirable but must be accepted. 1997 Internet World Advertising may be a necessary evil. After all, someone has to support Internet ventures. See also: evil, necessarya ˌnecessary ˈevil a thing that is unpleasant or even harmful, but which must be accepted because it brings some benefit: Injections against tropical illnesses are a necessary evil when you are planning to travel to that part of the world. ♢ I suppose all these security measures are a necessary evil.See also: evil, necessarythe necessary n. money; an income. (Also a really old term for a toilet or bathroom.) I can always use more of the necessary. See also: necessarynecessary
necessary1. Logica. (of a statement, formula, etc.) true under all interpretations or in all possible circumstances b. (of a proposition) determined to be true by its meaning, so that its denial would be self-contradictory c. (of a property) essential, so that without it its subject would not be the entity it is d. (of an inference) always yielding a true conclusion when its premises are true; valid e. (of a condition) entailed by the truth of some statement or the obtaining of some state of affairs 2. Philosophy (in a nonlogical sense) expressing a law of nature, so that if it is in this sense necessary that all As are B, even although it is not contradictory to conceive of an A which is not B, we are licensed to infer that if something were an A it would have to be B necessary
necessary See Medically necessary. ne·ces·sar·y (nes'ĕ-sar-ē) Requisite or essential. [L. necessarius]Patient discussion about necessaryQ. Is it really necessary to take antibiotic the whole week? Three days ago my 10 years-old son had a sore throat, after a very short examination the doctor said my son has pharyngitis and that he has to take antibiotics for ten days. He took it for two days and now he no long has any sore throat- Why does he have to take the antibiotic for so long? I don’t want him to take too many medications…A. In order to prevent the complications that the simple sore throat may have in the future, it’s very important to take the medication the whole 10 days. Even though it seems it’s no longer necessary- it is. Q. is it ok to use drugs for medical reasons? and who is to decide when is necessary to use drugs when needed? A. Today the most used "medical" drugs are narcotics- for pain relief, for patients who suffer extreme pain. All sorts of Codaine and Morphine types are used and on a very wide basis, and they are specially perscribed for ones who need them. Q. tender protuding lymph node lump rt. arm pit aprox. 1/2" dia. any concerns or recommend treatment necessary? A. lymph nodes can flare up any time you get infected in the armpit and all the area that it drains. i had it several times and it went away in the same manner that it came. i think that sometimes it caused because of a blockade done by deodorant. so i try to use this Chinese salt stone that doesn't contain aluminum. More discussions about necessarynecessary
Related to necessary: Necessary and sufficientnecessaryadj., adv. 1) essential. 2) less forcefully, it can mean convenient, useful, or making good sense. Necessary
NecessaryAn expense that is appropriate and helpful in furthering the taxpayer's business or income-producing activity. See also Ordinary defined elsewhere in this glossary.See NECY
NECESSARY
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| NECESSARY➣Never Eat Cake, Eat Salad Sandwiches and Remain Young (spelling mnemonic) |
necessary
Related to necessary: Necessary and sufficientSynonyms for necessaryadj neededSynonyms- needed
- demanded
- required
- called for
- essential
- vital
- compulsory
- incumbent
- mandatory
- imperative
- indispensable
- obligatory
- requisite
- de rigueur
- of the essence
- needful
Antonyms- unnecessary
- superfluous
- expendable
- dispensable
- nonessential
- inessential
adj inevitableSynonyms- inevitable
- sure
- certain
- unavoidable
- inescapable
Antonymsphrase the necessarySynonyms- money
- means
- funds
- capital
- cash
- finances
- resources
- dough
- the readies
- dosh
- the wherewithal
- wonga
Synonyms for necessaryadj incapable of being dispensed withSynonyms- essential
- indispensable
- needful
- required
- requisite
adj imposed on one by authority, command, or conventionSynonyms- compulsory
- imperative
- mandatory
- obligatory
- required
- requisite
Synonyms for necessarynoun anything indispensableSynonyms- essential
- requisite
- necessity
- requirement
Related Words- thing
- desideratum
- must
- need
- want
adj absolutely essentialRelated Words- obligatory
- essential
- indispensable
Antonymsadj unavoidably determined by prior circumstancesRelated Words |