Submerge (verb)

1. To cause to be covered or surrounded by a liquid, especially water.
2. To put something under water, especially with the intention of hiding or protecting it.
3. To cause something to sink or become covered or enveloped by something, especially as a result of pressure or weight.

Origin:

From latin submersus, past participle of submergere 'to dip under'.

Examples:

1. The city was submerged by the rising floodwaters.
2. The treasures were submerged in the ocean to protect them from being discovered by enemy forces.
3. The submarine was able to submerge to depths where no other vessel could go.
4. The diver submerged into the water to retrieve the lost artifact.
5. The submarine was able to submerge quickly to escape detection.