"submerge" in the verb sense
1. submerge, submerse
sink below the surface go under or as if under water
2. submerge, drown, overwhelm
cover completely or make imperceptible
"I was drowned in work"
"The noise drowned out her speech"
3. submerge, submerse
put under water
"submerge your head completely"
4. inundate, deluge, submerge
fill or cover completely, usually with water
Source: WordNet® (An amazing lexical database of English)
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