A nare is one of the two openings in the nose that let you breathe.
Nares are just a part of the body, like fingers or toes.
Examples:
I can breathe through my nare.
My cat's nare is very sensitive.
The nare is where the air goes in.
I have two nares, one on each side of my nose.
If you cover your nares, you can't breathe.
My nare is itchy.