The Hebrew verb natsah means to quarrel, fight, strive, or be in contention. It describes physical fighting between individuals or groups, as well as verbal disputes. The word appears in Exodus in the famous case of the two Hebrews fighting, as well as in the story that motivates Moses to flee Egypt.
Natsah describes the human tendency toward conflict — the strife that mars relationships and communities. The presence of natsah (fighting/quarreling) in Israel was a sign of spiritual failure and covenant breakdown. In Proverbs and wisdom literature, avoiding unnecessary strife is a mark of wisdom: 'It is to one's honor to avoid strife' (Proverbs 20:3). Yet the word also describes legitimate conflict against injustice — Moses intervenes when he sees an Egyptian striking a Hebrew (Exodus 2:11-12), and later when two Hebrews are fighting (Exodus 2:13). Discerning when conflict is just and when it is mere quarreling is a mark of wisdom and character.