also: つねぎ
noun
everyday clothes; ordinary wear
Archaic term for clothing worn in daily life, as opposed to formal or special attire. Not used in modern Japanese; the modern equivalent is 普段着 (ふだんぎ).
江戸時代の文献には「常着」という語が見られる。
The word 常着 appears in documents from the Edo period.
昔は、晴れ着と常着をはっきり区別していた。
In the past, people clearly distinguished between formal wear and everyday clothes.
Compound of 常 (everyday, ordinary) and 着 (clothing). The exact historical derivation is uncertain, but it follows a common Sino-Japanese pattern for clothing terms.