• vt. 即興創作；即興表演；臨時做；臨時提供
• vi. 即興創作；即興表演；臨時湊合

im-,不，非，-provise,準備，詞源同provide.即沒準備，臨時做的，即興準備。

improvise

improvise: [19] Etymologically, if you improvise something, it is because it has not been ‘provided’ for in advance. The word comes via French improviser from the Italian adjective improvviso ‘extempore’, a descendant of Latin imprōvīsus ‘unforeseen’. This in turn was formed from the negative prefix in- and the past participle of prōvīdere ‘foresee’ (source of English provide).

The earliest recorded use of the verb in English is by Benjamin Disraeli in Vivian Grey 1826: ‘He possessed also the singular faculty of being able to improvise quotations’. (The closely related improvident ‘not providing for the future’ [16] preserves even more closely the sense of its Latin original.)
=> provide

improvise (v.)

1826, back-formation from improvisation, or else from French improviser (17c.), from Italian improvisare "to sing or speak extempore," from improviso, from Latin improvisus "unforeseen, unexpected" (see improvisation). Or possibly a back-formation from improvisation. Related: Improvised; improvising.

1. They show no disposition to improvise or to take risks.

他們不愿意臨時湊合或冒險。

來自柯林斯例句

2. Sometimes I improvise and change the words because I forget them.

有時，我臨場發揮改了詞，因為我把原來的詞給忘了。

來自柯林斯例句

3. I then begin to improvise melodies vocally.

接著我開始哼起即興創作的旋律。

來自柯林斯例句

4. There isn't much equipment. We're going to have to improvise.

設備不多，我們只能將就著用。

來自《權威詞典》

5. The church organist may improvise on a ground bass.

教堂風琴手可能以基礎低音即興演奏.

來自《簡明英漢詞典》