extemporizes

英 [ɪkˈstempəraɪzɪz]

美 [ɪkˈstempəraɪzɪz]

v.  即席发言; 即兴表演
extemporize的第三人称单数

柯林斯词典

in BRIT, also use 英国英语亦用 extemporise


• VERB 即席演说;即兴表演
  If youextemporize, you speak, act, or perform something immediately, without rehearsing or preparing it beforehand.
  1. He completely departed from the text and extemporized in a very energetic fashion.
     他完全脱稿，慷慨激昂地进行即席演说。