Abarim Publications' online Biblical Hebrew Dictionary
עכר
The verb עכר (akar) means to stir up, disturb or trouble. HAW Theological Wordbook of the Old Testament remarks that this verb "reflects the social dimension of an individual's action".
Jacob uses this verb to describe his position among the Canaanites when Simeon and Levi killed the men of Shechem after the rape of Dinah (Genesis 34:30).
After years of drought, king Ahab accuses Elijah of being the troubler of Israel (1 Kings 18:17). King Solomon proclaimed that a cruel man brings trouble to his own flesh (Proverbs 11:17), and a man who brings trouble on his household inherits the wind (Proverbs 11:29).
This verb's derivation עכור (akor) means trouble, but it occurs only as the name Achor. Also note the striking similarity with the Greek word αχος (achos), meaning pain or grief.