-swamp-

meaning:

1. to cover a place or thing with a large amount of water
His fishing boat was swamped by an enormous wave last night.

2.(too much/big)verb If something swamps a person, system or place, they receive more of it than they can easily deal with
Foreign cars have swamped the UK market.
I'm swamped with work at the moment.
Don't let feelings of depression swamp you.

INFORMAL If clothes swamp you, they are much too big for you.