breather : Idioms & Phrases
snorkel breather
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noun air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time
snorkel; schnorkel; schnorchel; breather.
WordNet
take a breather
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verb take a short break from one's activities in order to relax
breathe; catch one's breath; rest.
WordNet
water breather
Wa"ter breath"er
Definitions
(Zoöl.) Any arthropod that breathes by means of gills.