死而後已

until death puts an end (idiom); one's whole life / unto one's dying day

to die / impassable / uncrossable / inflexible / rigid / extremely / damned

and / as well as / and so / but (not) / yet (not) / (indicates causal relation) / (indicates change of state) / (indicates contrast)

after that / then

back / behind / rear / afterwards / after / later / post-

already / to stop / then / afterwards

to bend to a task and spare no effort unto one's dying day (idiom); striving to the utmost one's whole life / with every breath in one's body, unto one's dying day