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2Significado: informalcasual unprepared extemporaneous extemporary extempore spontaneousimpromptu unstudied unrehearsed unpremeditated improvised offhand
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3Significado: automaticunconscious instinctive uncontrolledreflex involuntary impromptu
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4Significado: inventionimpromptu innovation improvisation
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5Significado: without previous thoughtcarelessly impromptu spontaneous unrehearsedunplanned immediate off the top of one's head