“Now no chastening seems to be joyful for the present, but grievous; nevertheless, afterward it yields the peaceable fruit of righteousness to those who have been trained by it.” Hebrews 12:11.
“These six things the Lord hates, yes, seven are an abomination to Him: a proud look, a lying tongue, hands that shed innocent blood, a heart that devises wicked plans, feet that are swift in running to evil, a false witness who speaks lies, and one who sows discord among brethren.” Proverbs 6:16-19.
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.
“Then a leper came to Him, imploring Him, kneeling down to Him and saying to Him, ‘If You are willing, You can make me clean.’ Then Jesus, moved with compassion, put out His hand and touched him, and said to him, ‘I am willing; be cleansed.’ And as soon as He had spoken, immediately the leprosy left him, and he was cleansed.” Mark 1:40-42.
“He who is unjust, let him be unjust still; he who is filthy, let him be filthy still; he who is righteous, let him be righteous still; he who is holy, let him be holy still.” Revelation 22:11.
