noun
sock
SAHK/sɑːk/
A knitted covering for the foot worn inside a shoe.
The sock lies beside the shoe, its cuff, heel, and rounded toe visible.

Etymology
Soccus named a light shoe or slipper, rather than an undergarment. Its descendant came to name the knitted or woven foot covering worn inside a shoe.
In context
this is called a foot sock it's just something people put on their feet when they're trying on shoes at the shoe store
More examples
- These wool socks keep my feet warm.
- There is a hole in the heel of my sock.
- He packs an extra pair of socks for the hike.
Forms
sock · socks
sockless adjective — Not wearing socks on the feet.
Similar words
- stocking
- Usually covers more of the leg than a sock.