expression
with hushed footsteps; stealthily; quietly
Describes moving quietly so as not to be heard; often used in narrative or descriptive contexts.
See also: 殺す (ころす)
彼は足音を殺して廊下を歩いた。
He walked down the hallway with hushed footsteps.
泥棒は足音を殺して家の中に入った。
The burglar entered the house stealthily.