extemporaneous /ɛkˌstɛmpəˈreɪnijəs/ adjective /ɛkˌstɛmpəˈreɪnijəs/
adjective
Learner's definition of EXTEMPORANEOUS
[more extemporaneous; most extemporaneous]
: made up or done without special preparation即兴的;即席的;无准备的 —
usually used to describe public speaking通常用来形容演讲
— extemporaneously
adverb