Implacable (aspondoi). Truce-breakers. Old word, only here in N.T. though in MSS. in Rom 1:31 (from a privative and spondē, a libation).
Slanderers (diaboloi). See note on 1Ti 3:11; Tit 2:3.
Without self-control (akrateis). Old word (a privative and kratos), here only in N.T.
Fierce (anēmeroi). Old word (a privative and hēmeros, tame), only here in N.T.
No lovers of good (aphilagathoi). Found only here (a privative and philagathos, for which see note on Tit 1:8). See also Phi 4:8. A papyrus describes Antoninus as philagathos and has aphilokagathia.