(n.) The act of sighing, or fetching a long and deep breath; a deep respiration; a sigh.

air cylinder aquascope artificial respiration aspiration asthmatic wheeze bathyscaphe bathysphere benthoscope breath breath of air breathing broken wind cough diving bell diving boat diving chamber diving goggles diving helmet diving hood diving mask diving suit exhalation expiration exsufflation gasp gulp hack hiccup inhalation inhalator inspiration insufflation iron lung mouth-to-mouth resuscitation oxygen mask oxygen tent pant periscope puff respiration scuba sigh sneeze sniff sniffle snore snoring snorkel snuff snuffle sternutation stertor submarine suspiration swim fins wet suit wheeze wind