C2 adverb /ɪkˈstem.pɔːr/
Extempore
即兴的;即席的;未经准备的
Meaning
without preparation; spontaneously; improvised
Example
The speaker delivered an impressive extempore speech at the conference.
演讲者在会议上发表了一场令人印象深刻的即兴演讲。