verb (v)

• expel (gases or odors)(verb.body)

  Synonym:
  breathe, pass off
  

  source: wordnet30
• give off, send forth, or discharge; as of light, heat, or radiation, vapor, etc.(verb.weather)

  Example:
  The ozone layer blocks some harmful rays which the sun emits.
  

  Synonym:
  give off, give out
  Antonym:
  absorb, take in
  

  source: wordnet30
• express audibly; utter sounds (not necessarily words)(verb.communication)

  Synonym:
  let loose, let out, utter
  

  source: wordnet30
• To send forth; to throw or give out; to cause to issue; to give vent to; to eject; to discharge; as, fire emits heat and smoke; boiling water emits steam; the sun emits light.(verb)

  source: webster1913