-zlə̇s adjective
Etymology: noise (I) + -less
1. : making or causing no noise or stir : free from noise : silent , quiet
kittens on noiseless feet
2.
a. : making less noise than is typical of its kind
b. of a typewriter : having a type-bar action that is quieter than that of a standard typewriter
• noise·less·ly adverb
• noise·less·ness noun -es