evil

adj. 1 morally bad; wicked. 2 harmful. 3 disagreeable (evil temper). n. 1 evil thing. 2 wickedness.  evilly adv. [old english]

a. 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.