This verb combines 'judge' (brabeuō) with 'against' (kata), meaning to judge someone unworthy of a prize, to disqualify, or to cheat someone of their reward. In Colossians 2:18, Paul warns, 'Let no one disqualify (katabrabeuetō) you, insisting on asceticism and worship of angels.' The image is athletic: a judge ruling a competitor ineligible or denying them their rightful prize. Paul warns against false teachers who would declare believers unfit or inadequate unless they adopt extra-biblical practices—these judges have no authority to disqualify those whom Christ has declared righteous.