extemporaneous

同义
unrehearsed off-the-cuff offhand offhanded extemporaneous extemporary extempore impromptu ad-lib
词性
s
解释
with little or no preparation or forethought
示例
his ad-lib comments showed poor judgment|an extemporaneous piano recital|an extemporary lecture|an extempore skit|an impromptu speech|offhand excuses|trying to sound offhanded and reassuring|an off-the-cuff toast|a few unrehearsed comments