in BRIT, also use 英国英语亦用 extemporise
VERB 即席演说;即兴表演 If you
extemporize, you speak, act, or perform something immediately, without rehearsing or preparing it beforehand.
即席演说;即兴表演 [formal] View usage for:All yearsLast 10 yearsLast 50 yearsLast 100 yearsLast 300 years