obbligato

• n. 伴奏；助奏
• adj. 不可缺少的

音乐术语，来自意大利语obbligato,来自拉丁语obligare,绑定，词源同oblige.

obbligato (adj.)

musical instruction, 1724, from Italian obbligato, literally "obligated," from Latin obligatus, past participle of obligare "to bind" (see oblige). In reference to a necessary accompaniment by a single instrument.