noun / verb
siphon
SIGH-fun/sˈaɪfʌn/
A tube that draws liquid over a raised point to a lower outlet.
A clear siphon carries water from the upper vessel into the lower one.

Etymology
Greek siphōn named a tube used to draw wine from a cask. The English noun came to name a pressure-operated draining tube, and the verb means conveying liquid by means of that device.
More examples
- We siphon water from the aquarium into a bucket on the floor.
- She siphoned rainwater over the barrel's rim into a lower tank.
- The siphon stops working when air enters the tube.
Forms
siphon · siphons · siphoned · siphoning