submarine
adjective
°Under water.
°Of something hidden or undisclosed, e.g. submarine patent.
noun
°A boat that can go underwater.
°A kind of sandwich made in a long loaf of bread.
verb
°To operate or serve on a submarine.
°To torpedo; to destroy with a sudden sneak attack.
synonyms: u-boat, grinder, hero, hoagie more» , hoagy, poor boy, po' boy, sub, submarine sandwich, torpedo, wedge