A form of godliness (μορφωσιν ευσεβειας). For μορφωσιν, see Romans 2:20. The outward shape without the reality.

Having denied (ηρνημενο). Perfect middle participle of αρνεομα (see 2. Timothy 2:12).

Power (δυναμιν). See 1. Corinthians 4:20. See Romans 1:29-31 for similar description.

Turn away (αποτρεπου). Present middle (direct) imperative of αποτρεπω, "turn thyself away from." Old verb, only here in N.T. See IV Macc. 1:33.