noiseless

noise +‎ -less

noiseless (comparative more noiseless, superlative most noiseless)

1. Producing no noise; without noise.

   Synonym: noise-free

   The movements of the cat were noiseless as it approached the mousehole.

   • 1850, [Alfred, Lord Tennyson], In Memoriam, London: Edward Moxon, […], →OCLC, Canto XX, page 33:

     For by the hearth the children sit
     ⁠Cold in that atmosphere of Death,
     ⁠And scarce endure to draw the breath,
     Or like to noiseless phantoms flit:
     But open converse is there none, […]

2. Containing no noise.
   • 2016, Abdelrahman Desoky, Noiseless Steganography, page 4:

     The core idea of the Nostega paradign is basically camouflaging messages by embedding them in a form of noiseless data by employing either altered authenticated data or legitimate untraceable data, as shown in Section 1.3.

• lionesses, selenosis