Breather

n.
  1. One who breathes.
  2. That which puts one out of breath, as violent exercise.
  3. a pause to catch one's breath, or for some other form of rest or refreshment; -- often used in the phrase to take a breather, i.e. to pause for refreshment.
  4. a vent in a container to allow equalization of internal and external pressure.
  5. an air intake pipe to provide air to machinery or people submerged or otherwise sealed off from the outside.
    1. One who lives.
    2. One who utters.
    3. One who animates or inspires.