Meaning

adjective morally bad in principle or practice

adjective having committed unrighteous acts

adjective intensely or extremely bad or unpleasant in degree or quality

originFrom Middle English wicked, wikked, an alteration of Middle English wicke, wikke (“morally perverse, evil, wicked”). Of uncertain origin. Possibly from an adjectival use of Old English wiċċa (“wizard, sorcerer”), from Proto-West Germanic *wikkō (“necromancer, sorcerer”), though the phonology makes this theory difficult to explain. Alternatively, perhaps related to English wicker, Old Norse víkja…

Etymology from Wiktionary, CC BY-SA 3.0