יָכַח
yakach (yaw-kahh') v.
1. to be right (i.e. correct)
2. reciprocal, to argue
3. causatively, to decide, justify or convict
[a primitive root]
KJV: appoint, argue, chasten, convince, correct(-ion), daysman, dispute, judge, maintain, plead, reason (together), rebuke, reprove(-r), surely, in any wise.