noun
opening line; first bars
Refers to the beginning of a poem or the initial musical phrase of a melody. Often used when discussing lyrics or musical composition.
この曲の歌い出しはとても印象的だ。
The opening bars of this song are very striking.
歌い出しの歌詞を忘れてしまった。
I forgot the lyrics of the first line.
Compound of 歌い (stem of 歌う 'to sing') + 出し (noun form of 出す 'to start'). Literally 'singing start'.