Thayer's Greek LexiconSTRONGS NT 180: ἀκατάπαστος
ἀκατάπαστος, — found only in 2 Peter 2:14 in manuscripts A and B, from which L WH Tr marginal reading have adopted it instead of the Rec. ἀκαταπαύστους, which see It may be derived from πατέομαι, perfect πεπάσμαι, to taste, eat; whence ἀκατάπαστος insatiable. In secular writings κατάπαστος (which Alexander Buttmann (1873) conjectures may have been the original reading) signifies besprinkled, soiled, from καταπάσσω to besprinkle. For a fuller discussion of this various reading see Buttmann, 65 (57) (and WH's Appendix, p. 170).
STRONGS NT 180: ἀκατάπαυστοςἀκατάπαυστος, (καταπαύω), unable to stop, unceasing; passively, not quieted, that cannot be quieted; with the genitive of thing (on which cf Winer's Grammar, § 30, 4), 2 Peter 2:14 (R G T Tr txt) (eyes not quieted with sin, namely, which they commit with adulterous look). (Polybius, Diodorus, Josephus, Plutarch)