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 Hebrews 7:18.