dive - plunge into water; "I was afraid to dive from the board into the pool"

go under, go down, sink, settle - go under, "The raft sank and its occupants drowned"

spread over, cover - form a cover over; "The grass covered the grave"

immerse, plunge - thrust or throw into; "Immerse yourself in hot water"

flood - cover with liquid, usually water; "The swollen river flooded the village"; "The broken vein had flooded blood in her eyes"