Rinse One’s Mouth Without Swallowing Liquid
Puzzle 14 of Aquarium Easy Pack
Question is: Rinse One’s Mouth Without Swallowing Liquid
and the answer is: GARGLE
Word Meaning:
GARGLE — (intransitive) To clean one's mouth by holding water or some other liquid in the back of the mouth and blowing air out from the lungs.
Definitions from Wiktionary.