noun
Refers to a pocket sewn on the inside of a garment, such as a jacket or coat.
コートの中衣くしに財布を入れた。
I put my wallet in the inside pocket of my coat.
More common modern term for 'inside pocket'; 中衣くし is a traditional or less frequent alternative.
Compound of 中 (naka, 'inside') + 衣 (koromo, 'garment') + くし (kushi, possibly from 串 'skewer' or a phonetic element). The exact derivation is uncertain.