improvise
/ˈɪmprəvaɪz/verb
with obj.
1- create and perform (music, drama, or verse) spontaneously or without preparation即席创作表演（音乐, 戏剧, 诗歌）：
the ability to improvise operatic arias in any given style
即席创作任一风格歌剧咏叹调的能力
no obj. he was improvising to a backing of guitar chords他在吉他和弦的陪衬下即席表演
as adj. improvised improvised humour.随口而出的幽默。
1.1
- produce or make (something) from whatever is available凑合出…：
I improvised a costume for myself out of an old blue dress
我用一件蓝色旧衣服, 给自己凑合着化上装
as adj. improvised we camped out, sleeping on improvised beds.我们在外露营, 睡在凑合算是床的东西上。
派生词
improvisation
nounimprovisational
adjectiveimprovisatorial
adjectiveimprovisatory
adjectiveimproviser
noun词源
early 19th cent.: from French improviser or its source， Italian improvvisare, from improvviso 'extempore'， from Latin improvisus 'unforeseen'， based on provisus, past participle of providere 'make preparation for'.