Drown

verb

1. To die from suffocation while immersed in water or other fluid.
2. To kill by suffocating in water or another liquid.
3. To be flooded: to be inundated with or submerged in (literally) water or (figuratively) other things; to be overwhelmed.
4. To inundate, submerge, overwhelm.
5. (usually passive) To obscure, particularly amid an overwhelming volume of other items.

   "The answers intelligence services seek are often drowned in the flood of information they can now gather."