sluicing

The material of a sluice or sluiceway.

Present participle of sluice.

The act by which something is sluiced; a copious wetting; a drenching.

A kind of ellipsis, introduced by an interrogative, where (usually) everything except the interrogative is elided from the clause, as in “I like him, but I don’t know why”.

pouring from or as if from a sluice