The Hebrew noun to'evah denotes something profoundly detestable — that which causes loathing and disgust, especially to God. It appears approximately 116 times in the Old Testament, describing false worship, sexual sin, dishonest business, occult practices, and moral corruption. Proverbs uses the term to describe things that are offensive to God's moral character.
The vocabulary of to'evah communicates that God is not morally indifferent. He is not mildly displeased by sin — He is deeply and righteously repulsed by it. Understanding this drives the urgency of repentance and the wonder of atonement: that the God who calls these things detestable would nonetheless provide a way of cleansing (1 John 1:9). The term also clarifies the nature of false worship: idolatry is not merely wrong but repulsive to the One who created us for Himself.