per-

(word root) through, veryExamples of words with the root per-: pervert, pervade, perfect

per-

pref.1. Thoroughly; completely; intensely: perfervid.2. Containing an element in its highest oxidation state: perchloric acid.3. Containing a large or the largest possible proportion of an element: peroxide.4. Containing the peroxy group: peracid.

[Latin, from per, through; see per in Indo-European roots.]

per-

prefix 1. through: pervade. 2. throughout: perennial. 3. away, beyond: perfidy. 4. completely, throughly: perplex. 5. (intensifier): perfervid. 6. (Elements & Compounds) indicating that a chemical compound contains a high proportion of a specified element: peroxide; perchloride. 7. (Elements & Compounds) indicating that a chemical element is in a higher than usual state of oxidation: permanganate; perchlorate. 8. (Elements & Compounds) (not in technical usage) a variant of peroxy-: persulphuric acid. [from Latin per through]

per

(pɜr; unstressed pər)

prep. 1. for or in each or every; a or an: Membership costs $10 per year. 2. according to; in accordance with: I delivered the box per your instructions. 3. by means of; by; through: Send it per messenger. adv. 4. Informal. each; for each one: The charge was five dollars per. Idioms: as per, according to; in accordance with: arranged as per instructions. [1580–90; < Latin: through, by, for, for each. See for] usage: per meaning “for each” occurs chiefly in technical or statistical contexts: miles per gallon; cost per person. It is also common in sports commentary: 16 points per quarter.A or an is often considered more suitable in nontechnical use. per or as per meaning “according to” is sometimes criticized and is rare in edited writing.

per-

1. a prefix meaning “through,” “thoroughly,” “utterly,” “very”: pervert; pervade; perfect. 2. a prefix used in the names of inorganic acids and their salts that possess the maximum amount of the element specified in the base word: percarbonic (H₂C₂O₅) acid; potassium permanganate (KMnO₄). [< Latin, prefixal use of per per]

Per.

1. Persia. 2. Persian.

per.

1. percentile. 2. period. 3. person.

per-

word element [L.] 1. throughout; completely; extremely.2. in chemistry, a large amount; combination of an element in its highest valence.

per-

Do not confuse this prefix with peri-.1. Through, conveying intensity.
See also: peroxy-. 2. In chemistry, a prefix denoting either 1) more or most, with respect to the amount of a given element (usually oxygen, as in perchloric acid) or radical contained in a compound, or 2) the degree of substitution for hydrogen, as in peroxides, peroxy acids (for example, hydrogen peroxide, peroxyformic acid).
See also: peroxy-. [L. through, throughout, extremely]

per-

1. Prefix meaning through; denoting intensity. 2. chemistry More or most, with respect to the amount of a given element or radical contained in a compound; the degree of substitution for hydrogen, as in peroxides, peroxy acids (e.g., hydrogen peroxide, peroxyformic acid).
See also: peroxy-[L. through, throughout, extremely]

per-

prefix denoting thorough, very, extremely.

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