Sue, like the name. The final s is silent.
The words are cxefkuiristo and subkuiristo.
Un hôtel sous-marin or Un hôtel sous l'eau. sous-marin is an adjective sous l'eau is an adverb un sous-marin as a noun is a submarine boat
sous
The word "underneath" in French is "en dessous."
a submarine is called 'un sous-marin' (masc. - plural : des sous-marins) in French.
Underwear in French is called "sous-vêtements."
sous Such as if you wanted to say the pencil is under the desk it would be Le crayon est sous le bureau
The basement is 'le sous-sol' (masculine noun) in French.
basement ... sous-sol
sous vetements noirs
plaisir sous le soleil
"Dessous" or "sous", either is acceptable.