This is the 13811th most frequent Russian word.
носок
Sock.
Here, 'носок' (дғы plural 'носки') is used as the word for a garment worn on the feet - socks.
Я купил новые носки в магазине.
I bought new socks at the store.
In this sentence, 'носок' is singular and denotes one sock as a clothing item.
Надень носок, чтобы не замерзнуть.
Put on a sock so you don't get cold.
This usage of 'носок' refers to the front end or toe-tip of footwear, specifically a shoe.