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Synonyms for Breathe (same or very similar meaning)

WordNet sense 1 (take a short break from one's activities in order to relax):
rest, catch one's breath, take a breather

WordNet sense 2 (expel (gases or odors)):
emit, pass off

WordNet sense 3 (draw air into, and expel out of, the lungs):
respire, suspire, take a breath

From the ODE community, based on WordNetadd/edit