ὀλέθριος
ἵνα οὖν μηδ' ἐν τούτῳ δῷ αὐτοῖς λαβήν (Photius, Fragments on the Epistle to the Romans 483.26) → so that he doesn't give them even here a handle (= an opportunity for refutation)
English (LSJ)
ον, E.Hec.1084 (lyr.), Pl.Ep.334d ; but α, ον Hdt.6.112, LXX Wi.18.15, and freq. in Trag. (v. infr.) :—
A destructive, deadly, ὀ. ἦμαρ the day of destruction, Il.19.294,409, cf. ἐλεύθερον ἦμαρ, etc. ; so μανίη πάγχυ ὀ. Hdt.l.c. ; ὀ. μόρος A.Th.704 ; ἔξω κομίζων ὀλεθρίου πηλοῦ πόδα Id.Ch.697 ; κότος ὀ. ib.952 (lyr.) ; ὀλεθρία νύξ S.OC1683 (lyr.), etc. ; ψῆφος ὀλεθρία a vote of death, A.Th.198 : in S.Aj.799, ἔξοδον . . ὀλεθρίαν ἐλπίζει φέρειν seems to be = φέρειν εἰς ὄλεθρον : acc. sg. masc. predicatively used, ἀλλά μ' ἁ . . θεὸς ὀλέθριον αἰκίζει fatally, ib.402 (lyr.) :—rare in Prose, as Pl.R.389d, Gal.16.522 ; νόσοι Phld.Ir.p.57 W. (Sup.). Adv.-ίως Eust.132.16. 2 c.gen., γάμοι Πάριδος ὀλέθριοι φίλων bringing ruin on his friends, A.Ag. 1156 (lyr.). 3 c. dat., as Subst., ψύλλοις ὀλέθριον, name of a fluid, Philum.Ven.12.4. II of persons, in danger of death, Hp.Acut.58 ; lost, undone, S.Tr.878. Adv. -ίως, ἔχειν Gal.16.522, al. 2 rascally, worthless (cf. ὄλεθρος 11 nisi hoc leg.), Luc.DMort. 2.1 codd., Hist.Conscr.38 codd. ὀλεθρ-ιώδης, ες, gloss on λευγαλέη, Hsch.