Dictionary entry

ἑτεροζυγέω

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

*† ἑτερο-ζυγέω, -ῶ

[in LXX cf. ἑτερόζυγος, Le 19:19 (כִּלְאַיִם)*;]

to be unequally yoked: metaph., c. dat. pers., II Co 6:14.†