伴奏は英語で
accompaniment

英語の定義

伴奏
1. n. (music) accompaniment
2. v. to accompany (to perform an accompanying part next to another instrument)

accompaniment
1. n. (music) A part, usually performed by instruments, that gives support or adds to the background in music, or adds for ornamentation; also, the harmony of a figured bass.
2. n. That which accompanies; something that attends as a circumstance, or which is added to give greater completeness to the principal thing, or by way of ornament, or for the sake of symmetry.