extemporaneous
🇺🇸
/ɪkˌstempəˈreɪniəs/
🇬🇧
/ɪkˌstempəˈreɪniəs/
adjective
R
spoken or performed without prior preparation
The student delivered an extemporaneous speech that impressed everyone in the class.
該學生發表了一次即興演講，給班上的每個人留下了深刻印象。
translation
即興的