impromptu (adjective, adverb) impromptu: unrehearsed, improvised
Detalii: extemporaneous means 'prepared in advance and carried out with few or no notes' while impromptu means 'totally unprepared, performed on the spur of the moment' - but this distinction has been all but lostimpromptu conveys unrehearsed remarks or performance with an element of surprise, while extempore only suggests that this is done without notes or props
Sinonime: abating, collapsing, crumbling, declining, decreasing, descending, diminishing, ebbing, lowering, plunging, settling, sinking, sliding, slipping, subsiding, toppling, tottering, tumbling, weakening
Antonime: improving,
increasing,
rising