Strong's G3432 · Greek

μοιχός

moichos · moy-khos'

perhaps a primary word; a (male) paramour; figuratively, apostate

Scholarly Lexicons

Abbott-Smith Manual Greek Lexicon

 3 μοιχός , -οῦ, ὁ , [in LXX for נאף ;] an adulterer : Lk 18:11 , I Co 6:9 , He 13:4 .† 

G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain