διαπίνω · diapinō — LSJ
drink one against another, Hdt. 5.18, 9.16, Pl. R. 420e; = προπίνειν, Epig. 8:—Med., δ. ἀνδράσι Hedyl. ap. Ath. 11.486c.
drink at intervals, Anaxandr. 57:—but Pass., to be swallowed at a draught, διαπινόμενοι Arist. Pr. 872b27.