ἀνηλεής
From LSJ
εἰ πάλιν ἔστι γενέσθαι, ὕπνος σ' ἔ̣χει οὐκ ἐπὶ δηρόν, εἰ δ' οὐκ ἔστιν πάλιν ἐλθεῖν, αἰώ̣νιος ὕπνος → if it is possible for you to be born again, you will fall asleep, briefly; if it is not possible to return — it would be eternal sleep
English (LSJ)
ές,
A = ἀνελεής, without pity, unmerciful, Men.Epit.478, Call.Del.106, Parth.14.2, App.Mith.38; poet. acc. ἀνηλέα (as if from ἀνηλής) Epigr.Gr.418 (Cyrene); gen. ἀνηλέος Man.1.263; ἀνηλής is dub. in Alcm.81, cf.An.Ox.1.60. Adv. -εῶς Hp.Aff.40, And.4.39.