croon - definition and synonyms

verb [intransitive/transitive] 

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/kruːn/
present tense
I/you/we/theycroon
he/she/itcroons
present participlecrooning
past tensecrooned
past participlecrooned
  1. to sing in a slow soft voice
     Synonyms and related words
    1. a.
      to speak in a soft voice that is intended to make someone feel calm