διαπεπειρᾶσθαι
From LSJ
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)
Greek > English (Woodhouse Verbs Reversed)
(see also διαπειράομαι): to have had a foretaste of, to have had a taste of, to have had experience of
