A.T. Robertson Commentary Titus 3:9

"but shun foolish questionings, and genealogies, and strifes, and fightings about law; for they are unprofitable and vain." — Titus 3:9 (ASV)

Fightings about the law (μαχας νομικας). "Legal battles." See 1 Timothy 6:4; 2 Timothy 2:23. Wordy fights about Mosaic and Pharisaic and Gnostic regulations.

Shun (περιιστασο). Present middle imperative of περιιστημ, intransitive, step around, stand aside (2 Timothy 2:16). Common in this sense in the literary Koine.

Unprofitable (ανωφελεις). Old compound adjective (α privative and οφελος), in N.T. only here and Heb 7:18.