Long pants are pantalons.
Shorts (piece of clothing) are called the same in French: un short, des shorts.
In French, the word for "shorts" is "shorts." It is a masculine noun, so it would be described using masculine articles such as "le." For example, "le short" means "the shorts" in French.
Shorts kaki.
same thing: "shorts"
un short
In French, "shorts" is pronounced as "shor." The "ts" at the end is pronounced like a soft "s" sound.
The opposite of large in French is "petit".
The opposite of "long" in French is "court."
The opposite of "dessous" is "dessus" in French.
slip or short
un short
The opposite of "joli" in French is "mochte".