Lexical Definition

‎ἀπάγχομαι‎ apánchomai (ap-ang'-khom-ahee) to strangle G:V
from ‎ἀπό‎ and (to choke

hang himself.

Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
ἀπήγξατο hanged himself Matt.27.5
απήγξατο he hung himself LXX.2Sam.17.23

Abbott-Smith

ἀπ-άγχω (< ἄγχω, to press, strangle), [in LXX: II Ki 17:23 (חנק), To 3:10*;]
to strangle; mid., to hang oneself (or, to choke; v. M, Pr., 155): Mt 27:5.†

Abbott-Smith References

Book Refs
2 Samuel 17:23
Matthew 27:5

Liddell-Scott-Jones

ἀπάγχω,

strangle, throttle, μὲν λάε νεβρὸν ἀπάγχων[Refs 8th c.BC+]; μάλιστά μ᾽ ἀπάγχει chokes me with anger, [Refs 5th c.BC+] —middle, aorist ἀπηγξάμην, and passive, hang oneself, to be hanged, [Refs 7th c.BC+]am ready to choke, [Refs 5th c.BC+]