Having qualities tending to injury and mischief; having a nature or properties which tend to badness; mischievous; not good; worthless or deleterious; poor; as, an evil beast; and evil plant; an evil crop.(adjective)
Anything which impairs the happiness of a being or deprives a being of any good; anything which causes suffering of any kind to sentient beings; injury; mischief; harm; -- opposed to good.(noun)
source: webster1913
adverb (r)
In an evil manner; not well; ill; badly; unhappily; injuriously; unkindly.(adverb)