命在旦夕

to be at death's door (idiom)

life / fate / order or command / to assign a name, title etc

to exist; to be alive / (of sb or sth) to be (located) at / (used before a verb to indicate an action in progress)

dawn / morning / daybreak / day / dan, female roles in Chinese opera (traditionally played by specialized male actors)

dusk / evening / Taiwan pr. [xi4]