Awful, dreadful, terrible.

Of a fault, crime, sin, etc.: Involving a grave degree of guilt, deserving heavy penalties. In later use chiefly with stronger sense: Atrocious…

Of things, actions, language, etc.: Cruel, painful, bitter, severe, terrible, dreadful.

Morally offensive or repulsive; base, degraded, loathsome, vile. In later use also in weaker sense: Offending against propriety; highly objectionable.

Severe, burdensome, oppressive. Of a malefactor: flagrantly guilty; habitually offending. Chiefly in strong thief. Now archaic or historical.

Of an action or its result: excessively injurious or cruel; of the nature of a gross violation of justice, morality, decency, etc.; wicked, evil…

Hateful, odious; highly criminal or wicked; infamous, atrocious: chiefly characterizing offences, crimes, sins, and those who commit them.

Of persons or their actions: Transgressing the bounds of law, decency, or morality; outrageous, lawless, wrongful. Obsolete.

Deserving a curse; damnable, execrable, heinously wicked.

Intensely painful or destructive; keen, piercing; deadly. Of an incident, portion of time, etc.: dreadful, terrible; characterized by death.

figurative and in extended use. Originally: †immoral, sinful, morally repugnant (obsolete). Now: badly formed, framed, or executed; distorted…

Highly offensive or loathsome, esp. morally; evil, abominable, foul. In later use: esp. (of language, behaviour, etc.) grossly coarse or indecent…

= monstrous, adj. (in various senses).

Of sins and crimes (rarely of persons): Abnormally wicked, monstrous, outrageous. Obsolete.

That causes wonder or amazement; marvellous, astonishing. Also in an unfavourable sense: appalling.

Shameful, atrocious, horrible. Obsolete.

= nefandous, adj.

Atrociously wicked. Obsolete.

Like or befitting a monster; inhumanly wicked or depraved; atrocious, horrible. In later use frequently hyperbolical.

Relating to or characterized by death or funerals; gloomy, mournful.

Of persons or their actions: Extraordinarily wicked, outrageous, monstrous; = enormous, adj. 2.

Extremely wicked or immoral; grossly criminal; vile, atrocious, heinous; infamous.

Of actions, character, principles, etc.: Extremely wicked or criminal: heinous, villainous.

‘Dreadful, dismal, mournful, horrible, terrible, evil in a great degree’ (Johnson).

? A corruption of bominable, abominable. (Also conjecturally referred to ban, v. to curse, bone, n.1, and French bon good.)

Wicked, atrociously criminal. Cf. felon, adj., felonous, adj. Now chiefly poetic.

Abominable.

(un-, prefix1 affix 1.)

transferred and figurative. (a) Heathen-like; unchristian, uncivilized, barbarous; unworthy of a Christian; (b) colloquial abominable, disgusting…

Of persons and their actions: Departing from the rule of right, disorderly. Of a state of things: Disordered, irregular. Hence, excessively…

Extremely bad or objectionable; atrocious, detestable.

That one shrinks from naming; inexpressibly loathsome; abominable.

figurative. Morally black; extremely wicked. Obsolete.

Causing or portending death or evil; fatal, disastrous; dreadful.

Causing or portending death or evil; fatal, disastrous; dreadful; = funest, adj.

figurative. Of an offence (after Isaiah i. 18), hence occasionally of an offender: Heinous, deep-dyed.

Not to be spoken of, unmentionable; abominable, atrocious.

Abominable.

Characterized by savage enormity; excessively and wantonly cruel; heinously wicked. of actions.

objectively. Horrible to contemplate, shocking, dreadful, revolting. Often hyperbolically applied to bad or annoying things; cf. awful, adj., fearful…

Of an offence, crime, etc.; also of an offender: Glaring, notorious, scandalous, ‘flaming into notice’ (Johnson).

Atrocious.

colloquial (chiefly British). Awful, disgraceful, atrocious.

spec. Indescribably or inexpressibly bad or objectionable.