| verb | heave or utter a sigh; breathe deeply and heavily “She sighed sadly” |
| verb | draw air into, and expel out of, the lungs “I can breathe better when the air is clean” |
| sigh | noun | a sound like a person sighing |
| suspiration | noun | an utterance made by exhaling audibly |
| breather | noun | air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time |
| breathing | noun | the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation |
| respiratory | adjective | pertaining to respiration |
| respiration | noun | the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation |
| respirator | noun | a breathing device for administering long-term artificial respiration |