Dictionary entry

ἔγγυος

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

** ἔγγυος, -ου, ὁ, ἡ,

[in LXX: Si 29:15, 16, II Mac 10:28 *;]

a surety: He 7:22 (exx. from π., v. MM, Exp., xi; cf. Cremer, 222).†