The dictionary defines evil as, morally wrong; immoral; wicked. It could be something harmful or injurious; the synonyms though may be the best descriptions.
Depending on how it is used evil can be; sinful, iniquitous, depraved, base, vile, nefarious, pernicious, destructive, wickedness, unrighteousness, or corruption, to name a few.
“Now the serpent was more cunning than any beast of the field which the Lord God had made. And he said to the woman, ‘Has God indeed said, “You shall not eat of every tree of the garden”?’” Genesis 3:1.
“And He is the head of the body, the church, who is the beginning, the firstborn from the dead, that in all things He may have the preeminence. For it pleased the Father that in Him all the fullness should dwell, and by Him [Jesus] to reconcile all things to Himself [God the Father], by Him [Jesus], whether things on earth or things in heaven, having made peace through the blood of His cross.” Colossians 1:18-20.
