The term 'RUN UNDER WATER' can be solved by two crossword solutions, 'WET' and 'RINSE'. 'WET' is a three-letter word that means to become or make something WET. 'RINSE' is a five-letter word that means to wash something quickly with water. Running under water is an activity that involves submerging oneself in water and running while underwater. This activity can be used for exercise, fun, or even to escape from danger.