夜具
やぐ · yagu · JLPT N1 · noun
bedclothes
🛏️ 夜 (night) + 具 (gear) = night gear: the stuff you sleep under
夜 means night and 具 means tool or equipment, so 夜具 is the gear you use at night: the bedding.
夜 — 亠 lid + 亻 person + 夕 evening moon
夜 originally depicted a person (亻) under a roof (亠) with the moon (夕) beside them, evoking nighttime rest. The moon component 夕 carries the meaning of evening, while the surrounding elements set the scene of a person at night. Over time it came to mean 'night' in general.