Undersea

1. прилагательное подводный Синоним(ы): submarine, underwater 2. наречие а) под водой б) на морском дне

Большой англо-русский словарь

Undersea

I. adjective 1. being or carried on under the sea or under the surface of the sea Example: undersea oil deposits Example: undersea fighting 2. designed for use under the surface of the sea Example: an undersea fleet II. adverb or underseas under the sea; beneath the surface of the sea Example: photographs taken undersea

Merriam-Webster's Collegiate Dictionary