Snorkel
Part of speech: verb
Definition: To use a snorkel.
Part of speech: noun
Definition: A hollow tube, held in the mouth, used by swimmers for breathing underwater. A retractable tube fitted in diesel-engine submarines to allow sufficient ventilation that the engines may be used at periscope depth.
Breather
Part of speech: noun
Definition: Something or someone that breathes.A short break; a rest or respite.