Английский Этимологический словарь - improvisation

- 1786, from Fr. improvisation, from improviser "compose or say extemporaneously," from It. improvvisare, from improvviso "unforeseen, unprepared," from L. improvisus, from in- "not" + provisus "foreseen," also "provided," pp. of providere "foresee, provide." Improvident (1514), from the same source, is more strongly connected to the "provided" sense.