silent

silent
si‧lent W3 /ˈsaɪlənt/ adjective1.  NOT SPEAKING
  a. not saying anything:
    Alan was silent.
    remain/stay/keep silent
    She kept silent, forcing Buchanan to continue.
    The crowd fell silent (=became silent) when the President appeared.
  b. [only before noun] not talking much to other people
    the strong silent type (=a man who looks strong and does not talk very much)
  REGISTER
    Silent is used mainly in writing. In everyday English, people usually use not say anything rather than be silent:
   ▪ She didn’t say anything, so I carried on.
   ▪ The article doesn’t say anything about religion.
2.  NOT COMMUNICATING failing or refusing to talk about something or express an opinion
    silent on/about
    The report was silent on the subject.
3.  QUIET without any sound, or not making any sound:
    The large house was silent and lonely.
    At last the guns fell silent.
    Julie offered up a silent prayer that she would pass her exam.
    as silent as the grave (=completely silent in a mysterious or uncomfortable way)
4.  FILMS  [only before noun] a silent film has pictures but no sound
5.  LETTER a silent letter in a word is not pronounced:
    The ‘w’ in ‘wreck’ is silent.
—silently adverb:
    He sat silently by the bed.