Lexical Definition

‎ἐπιγαμβρεύω‎ epigambreúō (ep-ee-gam-bryoo'-o) to marry ^G:V
from ‎ἐπί‎ and a derivative of ‎γάμος‎

marry.

• to form affinity with, i.e. (specially) in a levirate way

Abbott-Smith

† ἐπι-γαμβρεύω (< γαμβρός, a connection by marriage) [in LXX: Ge 34:9, I Ki 18:21 ff., II Ch 18:1, Es 9:14 (חָתַן hithp.), Ge 38:8 R (יָבַם pi.), I Mac 10:54, 56 * ;]
1. to enter into affinity with: c. dat. (LXX, ll. c., exc. Ge 38:8).
2. to marry (as deceased husband's next of kin, cf. Ge 38:8): c. acc, Mt 22:24.†

Abbott-Smith References

Liddell-Scott-Jones

ἐπιγαμβρεύω-εύω,

become son-in-law, [LXX+6th c.AD+]

__2. become father-in-law, [LXX]
__II. ἐ. γυναῖκα take a woman to wife as her husband's next of kin, [LXX+NT]
__III. middle, intermarry with, [LXX]

_{LSJ Scripture Refs: LXX.1Kgs.18.22 ☩ LXX.Gen.38.8 ☩ Matt.22.24 ☩ LXX.Gen.34.9 ☩ LXX.2Chr.18.1}