Ah, the opposite of "trouvent" in French is "ne trouvent pas." It's like painting a happy little tree next to a sad little tree to create balance and harmony. Remember, mistakes are just happy accidents in language learning.
The opposite of "dessous" is "dessus" in French.
The opposite of arriver in French is en face de l'arrivant.
The opposite of cold in french is "chaud" meaning hot.
"Plus" is the French equivalent of the English "more", and so the opposite of "less"
Jeune means young in French. The opposite is 'vieux' (masc.) or 'vieille' (fem.).
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 large in French is "petit".
The opposite of "long" in French is "court."
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 of "contre" in French is "avec," which means "with."
lent
The opposite of "oui" in French is "non," which means "no."
The opposite of "arriver" in French is "partir," which means "to leave" or "to depart."