overwhelm

(verb) overcome, as with emotions or perceptual stimuli. Synonyms: overpower, sweep over, whelm, overcome, overtake.

(verb) charge someone with too many tasks. Synonyms: deluge, flood out.

(verb) cover completely or make imperceptible. Synonyms: submerge, drown. Examples: "I was drowned in work." "The noise drowned out her speech."

(verb) overcome by superior force. Synonyms: overpower, overmaster.