单词：extemporary 

形容词

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  [1.a.extemporary] (同义词:[ad-lib(n.即兴表演 adj. 即兴的, 临时穿插的 v. 在演奏时自由发挥 )]  [extemporaneous( adj. 无准备的, 即席的, 不用讲稿的, 善于即席讲话的, 临时的 )]  [extemporary( adj. 无准备的, 随口说的 )]  [extempore( adj. 即席的, 当场的 adv. 即席, 当场 n. 即席之作 )]  [impromptu( n. 即席演出, 即兴曲 adj. 即席的 adv. 即席地, 未经准备地 )]  [offhand( adj. 即时的, 无准备的, 唐突的 adv. 即时地, 随便地 )]  [offhanded( adj. 立即的, 即席的 )]  [off-the-cuff( adj. 未预备的, 即席的 )]  [unrehearsed]  )
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  注释列句：with little or no preparation or forethought; "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"
• 近义词 -> [unprepared( adj. 无准备的, 即席的, 尚未准备好的 )]