Source : Webster's Revised Unabridged Dictionary (1913)

Submerse \Sub*merse"\, a. (Bot.)
   Submersed.

Source : WordNet®

submerse
     v 1: sink below the surface; go under or as if under water [syn:
          {submerge}]
     2: put under water; "submerge your head completely" [syn: {submerge}]