under one's breath

• under one's breath: 小声で

---

• He had his eyes fixed on Harry and was muttering non-stop under his breath
  （スネイプはハリーを見据えたまま、休みなく何か呟いていた）
  J. K. Rawling, Harry Potter and the Philosopher's Stone, Bloomsbury, p. 140


• Quirrell cursed under his breath.
  （クィレルは小声で悪態を吐いた。）
  J. K. Rawling, Harry Potter and the Philosopher's Stone, Bloomsbury, p. 211


• He sang "Whiskey River" under his breath and tried to run "Black Mountain Rag" through his head from one end to the other.
  （小声で「ウィスキー・リヴァー」を口ずさんだり、頭の中で「ブラック・マウンテン・ラグ」を一曲全部流してみようとした。）
  Thomas Harris, Red Dragon, Berkley Books, ch. 2


• He was chanting under his breath.
  （彼は小声で何か歌っていた。）
  Thomas Harris, Red Dragon, Berkley Books, ch. 13