熬更守夜

to stay up through the night (idiom)

to boil / to simmer

to cook on a slow fire / to extract by heating / to decoct / to endure

to change or replace / to experience / one of the five two-hour periods into which the night was formerly divided / watch (e.g. of a sentry or guard)

more / even more / further / still / still more

to guard / to defend / to keep watch / to abide by the law / to observe (rules or ritual) / nearby / adjoining

to be on all-night duty / to be on night watch / to keep a vigil

variant of 夜[ye4]

night