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hum verb

  /ˈhʌm/
  • (intransitive) To make a sound from the vocal cords without pronouncing any real words, with one's lips closed.
canticchiare, mormorare, bofonchiare, brontolare, canterellare, sibilare
  • (intransitive) To drone like certain insects naturally do in motion, or sounding similarly.
ronzare

hum noun

  /ˈhʌm/
  • An often indistinct sound resembling human humming.
ronzio

humming

ronzio
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