collocutio
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)
Latin > English (Lewis & Short)
collŏcūtĭo: (conl-), ōnis, f. colloquor,
I a (familiar or private) conversation, conference (very rare): hominum, Cic. Tusc. 1, 13, 30; id. Att. 12, 1, 2: venire cum aliquo in collocutionem, Auct. Her. 1, 15, 25.—In plur.: familiarissimae cum aliquo, Cic. Phil. 11, 2, 5: in sermonibus collocutionibusque aliquid videre, id. Fam. 1, 9, 4.