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.
例文
1. They show no disposition to improvise or to take risks.
彼らは一時的な間に合わせや冒険を望んでいない。
2.Sometimes I improvise and change the words because I forget them.
時には、元の単語を忘れてしまったので、その場で単語を変えて発揮しました。
3.I then begin to improvise melodies vocally.
そして私は即興で作られたメロディーを口ずさみ始めた。
4.There isn 't much equipment.We 're going to have to improvise .
設備が多くないので、我慢して使うしかありません。
5.The church organist may improvise on a ground bass.