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impromptu
impromptu definition
im·promptu (im prämp′to̵̅o̅′)
adjective, adverb
without preparation or advance thought; offhand
Etymology: Fr < L in promptu, in readiness < in, in + promptu, abl. of promptus, readiness < promptus, brought out, ready, prompt
noun
an impromptu speech, performance, etc.
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