WICKED
severe, terrible, wicked
(adjective) intensely or extremely bad or unpleasant in degree or quality; “severe pain”; “a severe case of flu”; “a terrible cough”; “under wicked fire from the enemy’s guns”; “a wicked cough”
disgusting, disgustful, distasteful, foul, loathly, loathsome, repellent, repellant, repelling, revolting, skanky, wicked, yucky
(adjective) highly offensive; arousing aversion or disgust; “a disgusting smell”; “distasteful language”; “a loathsome disease”; “the idea of eating meat is repellent to me”; “revolting food”; “a wicked stench”
sinful, unholy, wicked
(adjective) having committed unrighteous acts; “a sinful person”
arch, impish, implike, mischievous, pixilated, prankish, puckish, wicked
(adjective) naughtily or annoyingly playful; “teasing and worrying with impish laughter”; “a wicked prank”
wicked
(adjective) morally bad in principle or practice
Source: WordNet® 3.1
Etymology 1
Adjective
wicked (comparative wickeder or more wicked, superlative wickedest or most wicked)
Evil or mischievous by nature.
Synonyms: evil, immoral, malevolent, malicious, nefarious, twisted, villainous, Thesaurus:evil
(slang) Excellent; awesome; masterful.
Synonyms: evil, awesome, bad, cool, dope, excellent, far out, groovy, hot, rad, Thesaurus:excellent
Usage notes
Use of "wicked" as an adjective rather than an adverb is considered an error in the Boston dialect.
Adverb
wicked (not comparable)
(slang, New England, British) Very, extremely.
Synonyms: hella, helluv
Noun
wicked pl (plural only)
People who are wicked.
Etymology 2
Verb
wicked
simple past tense and past participle of wick
Adjective
wicked (not comparable)
Having a wick.
Etymology 3
Adjective
wicked
(UK, dialect, obsolete) Active; brisk.
(Alternative form of) wick (Etymology 3 Adjective), as applying to inanimate objects only.
(British, dialect, chiefly, Yorkshire) Infested with maggots.
Source: Wiktionary
Wicked, a.
Definition: Having a wick; -- used chiefly in composition; as, a two-wicked
lamp.
Wick"ed a. Etym: [OE. wicked, fr. wicke wicked; probably originally
the same word as wicche wizard, witch. See Witch.]
1. Evil in principle or practice; deviating from morality; contrary
to the moral or divine law; addicted to vice or sin; sinful; immoral;
profligate; -- said of persons and things; as, a wicked king; a
wicked woman; a wicked deed; wicked designs.
Hence, then, and evil go with thee along, Thy offspring, to the place
of evil, hell, Thou and thy wicked crew! Milton.
Never, never, wicked man was wise. Pope.
2. Cursed; baneful; hurtful; bad; pernicious; dangerous. [Obs.]
"Wicked dew." Shak.
This were a wicked way, but whoso had a guide. P. Plowman.
3. Ludicrously or sportively mischievous; disposed to mischief;
roguish. [Colloq.]
Pen looked uncommonly wicked. Thackeray.
Syn.
– Iniquitous; sinful; criminal; guilty; immoral; unjust;
unrighteous; unholy; irreligious; ungodly; profane; vicious;
pernicious; atrocious; nefarious; heinous; flagrant; flagitious;
abandoned. See Iniquitous.
Source: Webster’s Unabridged Dictionary 1913 Edition