A collar is usually a part of a garment which goes around the neck of the wearer. By extension, the term is also used for objects which encircle things. This has nothing to do with nitrogen.
The collar that vicars wear is a clerical collar, not a dog collar. Dog collar is just a crude nickname. The clerical collar is also sometimes referred to as a Roman collar.
"Collar" is masculine, so it is "el collar".
White collar.
Blue collar
That is the scientific/ medical name for the collar bone
The plural of collar is collars.
A Herbert Hoover Collar is a round collar.
You can't make a collar. When you get a wolf, they automatically get a red collar. You don't need to make a collar.
"El collar" translates to "the necklace" in English.
"Collar" in French is "collier."
Halti collar is short for halter training collar or head collar. It is a collar placed on a dogs skull instead of around the neck for walks and training.
a chinky collar