Evil Means Fool
The root Hebrew word pronounced ev-eel means someone who despises wisdom, who mocks God's Word and is proudly guilty of violating it - hence why ev-eel is often translated into English as fool (the English word evil, although regarded as Anglo-Saxon in origin, is so close to the Hebrew word in meaning and pronunciation that it is very likely that the Anglo-Saxon word originated from the Hebrew farther back into antiquity). While there are a number of other words of the Scriptures that also mean and are translated as fool, ev-eel goes to the very heart of the matter; evil means fool, and fool means evil.
The English word ill is an abbreviation of evil, which means adversity. Sailors spoke of an "ill wind," not meaning that the wind was sick, but that it opposed the direction into which they wanted to sail. In humans, ill is used psychologically, as in ill will, or physically, as in ill health, even though physical "illness" is not necessarily the result of evil behavior - "ill" has, unfortunately, come to mean sick, even if the sick person is not "ill," or evil.
"they are wise to do evil"
Examples of how evil and fool mean the same thing, from instances where ev-eel is translated as fool or fools:
"The fear of The Lord is the beginning of knowledge: but fools despise wisdom and instruction." (Proverbs 1:7 KJV)
"The wise in heart will receive Commandments [see The First Commandment,
The Second Commandment,
The Third Commandment,
The Fourth Commandment,
The Fifth Commandment,
The Sixth Commandment,
The Seventh Commandment,
The Eighth Commandment,
The Ninth Commandment and
The Tenth Commandment]: but a prating fool shall fall." (Proverbs 10:8 KJV)
"The lips of the righteous feed many: but fools die for want of wisdom" (Proverbs 10:21 KJV)
"Fools make a mock at sin: but among the righteous there is favour." (Proverbs 14:9 KJV)
"Fools because of their transgression, and because of their iniquities, are afflicted." (Psalm 107:17 KJV)
"For My people is foolish, they have not known Me; they are sottish children, and they have none understanding: they are wise to do evil, but to do good they have no knowledge." (Jeremiah 4:22 KJV)
Fact Finder: Will there be any evil fools in the Kingdom of God?
See also Scenes From The Millennium