extempore

adjective
🔊/ɪkˈstempəri/
🔊/ɪkˈstempəri/
(formal)
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  1. spoken or done without any previous thought or preparation即席的;即兴的;无准备的 synonym impromptu
    • an extempore speech即席讲话
    Word Originmid 16th cent.: from Latin ex tempore ‘on the spur of the moment’ (literally ‘out of the time’).

extempore

adverb
🔊/ɪkˈstempəri/
🔊/ɪkˈstempəri/
(formal)
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  1. without any previous thought or preparation即席的;即兴的;无准备的
    • to speak/play extempore说/玩临时