Last out

I'm afraid your grandfather isn't going to last out for very long.

Source: wiktionary

Among the most modern of all the Pacific stock in Great Britain is the stud of "Merchant Navy" and "West Country" Pacifics on the Southern Region, and the rebuilding which is now being carried out, preserving all the best features of the Bulleid designs—such as the free-steaming boiler—and jettisoning the features that have given trouble, in particular the chain-driven valve-motion, should give the Southern a supply of highly-competent machines able to last out the remaining life of steam on the S.R.

Source: wiktionary

I suppose only an incurable optimist would have gambled on its lasting out its full five-year term in office, for there was little to hold its super-stars together except the desire for office.

Source: wiktionary