improbable
— Adjective
– English
～ too improbable to admit of belief; "a tall story"
improbable
— Adjective
– English
～ having a probability too low to inspire belief
improbable
— Adjective
– English
～ not likely to be true or to occur or to have occurred; "legislation on the question is highly unlikely"; "an improbable event"
improbableness
— Noun
– English
～ the quality of being improbable; "impossibility should never be confused with improbability"; "the improbability of such rare coincidences"
improbably
— Adverb
– English
～ not easy to believe; "incredibly, she survived the crash"
impromptu
— Adverb
– English
～ without advance preparation; "he spoke ad lib"
impromptu
— Adjective
– English
～ 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"
impromptu
— Noun
– English
～ an extemporaneous speech or remark; "a witty impromptu must not sound premeditated"
impromptu
— Noun
– English
～ a short musical passage that seems to have been made spontaneously without advance preparation
impromptu
— Noun
– Danish
～ lyrisk musikstykke for klaver