collar

Where it comes from

Collar came through Anglo-French from Latin collare, a neck band. Collare was formed from collaris, of the neck, which in turn came from collum, neck.

How the meaning developed

The noun for something worn around the neck became a verb meaning seize someone by the collar. Physical seizure broadened into capture or arrest, leaving police able to collar a suspect without touching the suspect's clothing.

In use

A collar is a band around the neck.
The verb first meant grabbing someone by that band.