足音を殺す (silence one's footsteps)
idiom1 sentence
A vivid metaphorical idiom literally 'kill the footstep-sound,' meaning 'silence one's footsteps, move stealthily.' Part of a wider 殺す-metaphor family for muting emanations: 声を殺す ('silence the voice'), 息を殺す ('hold one's breath'), 感情を殺す ('suppress emotion').
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