The Greek adjective amachos (ἄμαχος) means not quarrelsome, peaceable, or not given to fighting — composed of the alpha-privative and machē (battle, fighting, quarrel). It appears in the qualifications for church overseers and deacons in 1 Timothy and Titus.
Among the qualifications for church leaders, Paul requires that they be not quarrelsome — amachos (1 Timothy 3:3; Titus 3:2). A leader who provokes conflict or cannot pursue peace disqualifies himself from shepherding God's flock. Gospel leadership is inherently peaceable in character. This does not mean spineless compromise, but the self-controlled, Spirit-filled pursuit of shalom in every relationship — the mark of wisdom that is peaceable, gentle, open to reason (James 3:17).