【学个词 impromptu】impromptu - adj. 即兴的，无准备的，即席的;adv. 即兴地，即席地;n. 即兴曲（尤指独奏）；即席演出

　　Definition:

　　1 of 2 adjective

　　1: made, done, or formed on or as if on the spur of the moment : IMPROVISED

　　2: composed or uttered without previous preparation : EXTEMPORANEOUS

an impromptu party/performance - 临时晚会／即兴表演

　　2 of 2 noun

　　1: something that is impromptu

　　2: a musical composition suggesting improvisation

　　Did you know?

　　Impromptu most often describes things, such as speeches or gatherings, that are not prepared ahead of time but that instead happen spontaneously. An impromptu concert or photoshoot, for example, is conceived and executed in the moment. Impromptu was borrowed—spelling, meaning, and all—from French in the mid-18th century. The French had gotten the word from Latin, from the phrase in promptu, meaning “in readiness.” But the presence of prompt in there is no coincidence: both impromptu and prompt are ultimately derived from the Latin promere, meaning “to bring forth, take out.”

　　Example Sentences

　　Adjective

　　Two of my friends came by unexpectedly, and we had an impromptu little party in my kitchen.

　　He made an impromptu speech about honor and responsibility.

　　Noun

　　although five different lines had been written, the best choice turned out to be an impromptu from the tired actor himself

　　Adjective

　　Musk's lawyers argued that the tweet in question was impromptu and not intended to be manipulative.

　　—Christopher Hutton, Washington Examiner, 3 Feb. 2023

　　Other attendees included musician Will.i.am, who gave an impromptu toast, former Vice President and chairman of Generation Investment Management, Al Gore, and the World Food Programme’s David Beasley.

　　—Yasmeen Serhan, Time, 17 Jan. 2023