wickedyoudaoicibaDictYouDict
wicked: [13] Wicked and witch are closely related. Wicked is an extension, using the suffix -ed, of the now obsolete adjective wick ‘wicked’. And this in turn originated as an adjectival use of Old English wicca ‘wizard’, whose feminine form is the ancestor of modern English witch.
=> witch
wicked (adj.)youdaoicibaDictYouDict
c. 1200, extended form of earlier wick "bad, wicked, false" (12c.), which apparently is an adjectival use of Old English wicca "wizard" (see wicca). Formed as if a past participle, but there is no corresponding verb. For evolution, compare wretched from wretch. Slang ironic sense of "wonderful" first attested 1920, in F. Scott Fitzgerald. As an adverb from early 15c. Related: Wickedly.