moriturus
From LSJ
μὴ κακὸν εὖ ἔρξῃς· σπείρειν ἴσον ἔστ' ἐνὶ πόντῳ → do no good to a bad man; it is like sowing in the sea
mŏrĭtūrus, a, um, part. futur de morior.
moriturus V DEP :: die; expire, pass/die/wither away/out; decay; (FUT ACT PPL only, moriturus)