- extemporaneous
- 1656 (earlier extemporal, 1570), from L.L. extemporaneus, from L. ex tempore "offhand, in accordance with (the needs of) the moment," from ex- "out of" + tempore, abl. of tempus (gen. temporis) "time." The L. form extempore had been in use in Eng. since c.1553.