παραβλάπτω
From LSJ
προσέχετε ἀπὸ τῶν ψευδοπροφητῶν οἵτινες ἔρχονται πρὸς ὑμᾶς ἐν ἐνδύμασιν προβάτων ἔσωθεν δέ εἰσίν λύκοι ἅρπαγες → beware of the false prophets, who come to you in sheep's clothing, and inwardly are ravening wolves
English (LSJ)
A damage incidentally, X.Eph.4.2, Gal.UP13.3 (Pass.), al., Eun.Hist.p.246 D.; φρένες -βεβλαμμέναι EM322.23. 2 help to damage, Vett.Val.56.1.