Trouvent is the 3rd person plural, for the verb trouver (to find). The opposite would be "ils/elles perdent" (they lose).
The opposite of "dessous" is "dessus" in French.
The opposite is naruto
The opposite of cold in french is "chaud" meaning hot.
The opposite of arriver in French is en face de l'arrivant.
"Plus" is the French equivalent of the English "more", and so the opposite of "less"
Où se trouvent / où sont les toilettes des dames?
Literally, se trouvent means "find themselves," but it's used as the equivalent of the English phrase "are found" or "can be found," as in Les pyramides se trouvent en Egypte, "The pyramids are found in Egypt."
où sont les états-unis, où se trouvent les états-unis
The opposite of "dessous" is "dessus" in French.
The opposite of "joli" in French is "mochte".
grand, grande is the opposite of petit, petite.
The opposite is naruto
The opposite of cold in french is "chaud" meaning hot.
The opposite of arriver in French is en face de l'arrivant.
The opposite of "contre" in French is "avec," which means "with."
The opposite of "maintenant" in French is "plus tard," which means "later."
Sans being French for "without" I would think you're looking for Avec, French for "with"