soundlessly

from WordNet (r) 3.0 (2006)

soundlessly
    adv 1: without a sound; "he stood up soundlessly and
           speechlessly and glided across the hallway and through a
           door" [syn: {noiselessly}, {soundlessly}]

from The Collaborative International Dictionary of English v.0.48

Soundless \Sound"less\, a.
   Having no sound; noiseless; silent. -- {Sound"less*ly}, adv.
   -- {Sound"less*ness}, n.
   [1913 Webster]

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