noun / verb
collar
KAH-ler/ˈkɑːlər/
A band fitted around the neck.
The white collar folds around the pale blue shirt's neck opening.

Etymology
The ancestor names a band or chain worn around the neck. The clothing sense applies that same neck-encircling shape to the border of a shirt or coat.
In context
send the round medallion into Charlie's neck? Again, we can clearly see though that the cross emerges from the shirt collar.
More examples
- She straightens her shirt collar before the interview.
- He wears a protective collar while his neck heals.
- The officer collars the thief before he reaches the exit.
Forms
collar · collars · collared · collaring
collarless adjective — Having no collar around the neckline.
Similar words
- neckband
- Specifically a band forming the neck portion of a garment.
- choker
- A close-fitting necklace worn for decoration rather than restraint.