大限

the limit / maximum / one's allocated lifespan

see 大夫[dai4 fu5]

big; large; great / older (than another person) / eldest (as in 大姐[da4 jie3]) / greatly; freely; fully / (dialect) father / (dialect) uncle (father's brother)

to limit / to restrict / (bound form) limit / bound

facing the end (idiom); at the end of one's life / with one foot in the grave

to die / one's allocated lifespan is accomplished