Lexical Definition

‎πενθερός‎ pentherós (pen-ther-os') father-in-law G:N-M
of uncertain affinity

father in law.

Usage: 4 forms in 8 verses
Form Translated As     In Verse(s)
πενθερὸσ father-in-law John.18.13
πενθερόσ her father-in-law LXX.1Sam.4.19
your father-in-law LXX.Gen.38.13
πενθερόν her father-in-law LXX.Gen.38.25
his father-in-law LXX.Exod.4.18
πενθερού father-in-law LXX.Judg.1.16
her father-in-law LXX.1Sam.4.21
his father-in-law LXX.Exod.3.1

Abbott-Smith

πενθερός, -οῦ, ὁ, [in LXX chiefly for חָם, Ge 38:13, al.; also for חֹתֵן, Jg 1:16 A;]
a father-in-law: Jo 18:13.†

Abbott-Smith References

Book Refs
Genesis 38:13
Judges 1:16
John 18:13

Liddell-Scott-Jones

πενθερός, ,

father-in-law, [Refs 8th c.BC+]; λαβὼν Ἄδραστον π. [Refs 5th c.BC+]: in plural, parents-in-law, [Refs 5th c.BC+]

__II generally, connexion by marriage, e.g. brother-in-law, [Refs]; also, ={γαμβρός}, son-in-law, [Refs 5th c.BC+]. (Cf. Sanskrit bándhus 'kinsman', Lithuanian beñdras 'comrade', Gothic bindan 'bind'.)