Lexical Definition

‎πενθέω‎ penthéō (pen-theh'-o) to mourn ^G:V
from ‎πένθος‎

mourn, (be-)wail.

• to grieve (the feeling or the act)

Abbott-Smith

πενθέω, -ῶ, [in LXX chiefly for אבל;]
to mourn (for), lament;
(a) intrans. : Mt 5:4 (5) 9:15, I Co 5:2; π. καὶ κλαίειν, Mt 16:10, Lk 6:25, Ja 4:9, Re 18:15, 19; seq. ἐπί, c. acc., Re 18:11;
(b) trans., c. acc., II Co 12:21.†
SYN.: v.s. θρηνέω.

Abbott-Smith References

Liddell-Scott-Jones

πενθέω-έω,

Epic dialect 3rd.pers. dual πενθέωείετον [Refs 8th c.BC+]; Epic dialect infinitive πενθέωήμεναι [Refs 8th c.BC+]: future -ήσω[Refs 4th c.BC+]: aorist ἐπένθησα [Refs 4th c.BC+]: perfect πεπένθηκα [Refs 4th c.BC+]: (πένθος):— bewail, lament, especially for persons, νέκυν πενθέωῆσαι [πενθέωέειν τινα ὡς τεθνεῶτα 5th c.BC: Herodotus Historicus 4.95; π. γόοις 4th-5th c.BC: Aeschylus Tragicus “Persae” 545 (\_anapaest meter\_); π. τινὰς δημοσίᾳ 5th c.BC: Lysias Orator 2.66; π. τινὰ τριχί 4th-5th c.BC: Aeschylus Tragicus “Choephori” 173; ἐπί τινι π. καὶ κείρασθαι 4th c.BC: Aeschines Orator 3.211 ">Refs 8th c.BC+]: absolutely, mourn, go into mourning, [πενθέωεῖ νέον οἶκτον 4th-5th c.BC: Aeschylus Tragicus “Supplices” 64 ">Refs 5th c.BC+]:—passive, to be mourned for, [πενθέωεῖται 2nd c.AD: Arrianus Historicus “Tactica” 33.4. ">Refs 5th c.BC+]

__2 of things, π. κακά [Refs 5th c.BC+]