#1 submerge v. [submerse] sink below the surface; go under or as if under water. wn
#2 submerge v. [drown, overwhelm] cover completely or make imperceptible; "I was drowned in work"; "The noise drowned out her speech". wn
#3 submerge v. [submerse] put under water; "submerge your head completely". wn
#4 submerge v. [inundate, deluge] fill or cover completely, usually with water. wn
vizzz