Submerge

Webster's Dictionary of the English Language

·vt To put under water; to Plunge.

II. Submerge ·vi To plunge into water or other fluid; to be buried or covered, as by a fluid; to be merged; hence, to be completely included.

III. Submerge ·vt To cover or overflow with water; to Inundate; to Flood; to Drown.