彻夜
chè yè · HSK 7
the whole night
🌙 thorough + night = completely through the night
彻 means thorough or complete, 夜 means night. Che-ye sounds like check yeah — still awake! Used for pulling an all-nighter.
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.