CARNAL (σαρκικός, G4920; σάρκινος, G4921); fleshly, in the manner of the flesh, belonging to the realm of the flesh, opposite of spiritual.

The word has two main references: (1) physical, that which is earthly, material, secular, in contrast to spirit; something necessary to the physical (Rom 15:27; 1 Cor 9:11); subject to human sensibility (2 Cor 3:3); weak (10:4); temporary (Heb 7:16); also those appetites, desires and urges which may be expressed in harmony with divine law and be satisfied without violation of God’s law. (2) Ethical or moral, pertaining to or characterized by the flesh (sarx), hence weak and sinful (2 Cor 1:12). Romans 7:14 indicates a moral connotation: a disposition which is definitely antispiritual in its manifestation; the dynamic principle of sinfulness, “that element in man’s nature which makes for evil” (Burton), thus alienating man from God (Rom 8:5-8); also spiritual immaturity, not being delivered from that which is inherently evil (1 Cor 3:3, 4).

Connecting carnal with the mind, declares it to be “enmity against God” (Rom 8:7), a disposition so widely diffused in humanity, with such ascendancy over man that it is confirmed dislike to God, opposition to His will, and determination to frustrate the divine will by substituting self-will for His will.

The adverb, carnally, is an OT term describing forbidden sex relations (Lev 18:20; 19:20). The offender is so dominated by fleshly lusts that reason is ignored, God’s will despised and inherent rights of others violated. The term, used once in the NT (Rom 8:6 KJV), is without sexual connotation.

See [http://biblegateway/wiki/III. Flesh As Sinful. FLESH].