寝間着
ねまき · nemaki · JLPT N2 · noun
pajamas
👘 寝間着 = 寝る (sleep) + 間 (room) + 着 (wear): clothes worn in the sleeping room
寝 means sleep, 間 means room, and 着 means wear or clothing. Together they name the clothes you wear when going to bed.
着 — sheep 羊 (top) + eye 目 (bottom)
着 originated as a variant of 著, which depicted plants emerging visibly above ground (grass radical 艹 over 者). Over time 着 split off to carry meanings like 'attach,' 'wear,' or a verb suffix marking ongoing action (zhe), while 著 kept senses like 'manifest' or 'author.'