πενθητέον
From LSJ
καὶ ὑπολέλειμμαι ἐγὼ μονώτατος, καὶ ζητοῦσι τὴν ψυχήν μου λαβεῖν αὐτήν → and I, even I only, am left; and they seek my life, to take it away (1 Kings 19:14)
English (LSJ)
one must lament, τὸν θάνατον Ap.Ty.Ep.58.
Greek (Liddell-Scott)
πενθητέον: ῥηματ. ἐπίθ. τοῦ πενθῶ, δεῖ πενθεῖν, Γρηγ. Ναζ. Ι. 868Β.