noun / verb
snorkel
SNOR-kul/ˈsnɔːrkl/
A tube used to draw air from above the surface while underwater.
He breathes through a snorkel as he floats face down.

Etymology
Schnorchel meant “nose” or “snout” in naval slang and named a submarine airshaft for its resemblance to a nose or its noise in use. The name later extended to a swimmer’s breathing tube.
In context
if you've ever been snorkeling for example and you breathe through the snorkel tube then that is a fairly thick tube
More examples
- We snorkel over the reef to watch the fish.
- Rinse your snorkel with fresh water after each swim.
- The submarine raises its snorkel to draw in air.
Forms
snorkel · snorkels · snorkeled · snorkeling
snorkeler noun — A person who swims using a snorkel.