sub·merse /səbˈmɝs/
  (v.)使沈水里去;使陷入
  Sub·merse a. Bot. Submersed.
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  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]