Murmurers (γογγυστα). Late onomatopoetic word for agent, from γογγυζω (Matthew 20:11; 1. Corinthians 10:10) in the LXX (Exodus 16:8; Numbers 11:1; Numbers 11:14-29).

Complainers (μεμψιμοιρο). Rare word (Isocrates, Aristotle, Plutarch) from μεμφομα to complain and μοιρα lot or fate. Here alone in N.T.

Lusts (επιθυμιας). As in 2. Peter 3:3.

Swelling (υπερογκα). So in 2. Peter 2:18 (big words).

Showing respect of persons (θαυμαζοντες προσωπα). Present active participle of θαυμαζω to admire, to wonder at. Nowhere else in N.T. with προσωπα, but a Hebraism (in Leviticus 19:15; Job 13:10) like λαμβανειν προσωπον (Luke 20:21) and βλεπειν προσωπον (Matthew 22:16) and προσοπωλεμπτεω (James 2:9). Cf. James 2:1.

For the sake of advantage (ωφελειας χαριν). To themselves. See also verse Jude 1:11. The covetousness of these Gnostic leaders is plainly shown in 2. Peter 2:3; 2. Peter 2:14. For χαριν as preposition with genitive see Ephesians 3:1; Ephesians 3:14.