foist Copy link Outline 1. infulcio, si, tum, 42. suppōno, 3 (fraudulently) • foist: to thrust in improperly: 1. infulcio, si, tum, 4: he is for ever f.ing in this word, non desinit omnibus locis hoc verbum inf., Sen. Ep. 114, 19. 2. suppōno, 3 (fraudulently): v. to forge: to f. in false wills, (falsa) testamenta sup., Cic.: v. to forge.