ぼそっとabsent-mindedly, vacantly, idly, lazily, in a whisper

彼(かれ)はボソッと小(ちい)さな声(こえ)で返事(へんじ)をした。

He responded in a small, absent-minded whisper. {absent-mindedly, vacantly, idly, lazily, in a whisper}

何(なに)もしないでボソッと立(た)っている彼女(かのじょ)は邪魔(じゃま)だ。

She is a nuisance, standing there idly and doing nothing. {absent-mindedly, vacantly, idly, lazily, in a whisper}

私(わたし)は彼女(かのじょ)が小言(こごと)をボソッと呟(つぶや)くのを聞(き)き逃(のが)さなかった。

I did not miss her muttering complaints in a whisper. {absent-mindedly, vacantly, idly, lazily, in a whisper}

ボソッと何(なに)やら呟(つぶや)いて立(た)ち去(さ)った彼(かれ)が不気味(ぶきみ)で仕方(しかた)ありません。

He muttered something idly and left, which was quite eerie and left me no choice but to feel uneasy. {absent-mindedly, vacantly, idly, lazily, in a whisper}

鬱(鬱)患者(かんじゃ)がもう消(き)えてしまいたいとボソッと言(い)ったのを聞(き)き逃(のが)すところだった。

I almost missed hearing the depressed patient whispering that they wanted to disappear. {absent-mindedly, vacantly, idly, lazily, in a whisper}