silent

Adjective

• unable to speak because of hereditary deafness

• having a frequency below or above the range of human audibility
  • a silent dog whistle
    

• not made to sound
  • the silent `h' at the beginning of `honor'
    
  • in French certain letters are often unsounded
    

• implied by or inferred from actions or statements
  • gave silent consent
    
  • a tacit agreement
    
  • the understood provisos of a custody agreement
    

• failing to speak or communicate etc when expected to
  • the witness remained silent
    

• marked by absence of sound
  • a silent house
    
  • soundless footsteps on the grass
    
  • the night was still
    

Related words

• Synonyms: 
  dumb , mute , unsounded , tacit , understood , mum , soundless , still