Quarrel kwor'-el: Originally (1) "a complaint" (compare "querulous"), or (2) "a cause of complaint," and so (3) "a contention."
(1) In the King James Version Mark 6:19 (the Revised Version (British and American) "set herself"; the colloquial "had it in for him" is an exact translation) and Colossians 3:13 (momphe, "complaint"; so the Revised Version (British and American)).
(2) In 2 Kings 5:7 ('anah, "be opportune," the Revised Version margin "an occasion").
(3) In the King James Version Leviticus 26:25 (loose translation of naqam, "vengeance"; so the Revised Version (British and American)).
Compare Wisdom of Sirach 31:29 the King James Version (the Revised Version (British and American) "conflict") and Proverbs 20:3 the Revised Version (British and American) (the King James Version, "meddling").