porneuo(the Greek)
proneuw porneuo porn-yoo'-o
from 4204; to act the harlot, i.e. (literally) indulge unlawful lust (of either sex), or (figuratively) practise idolatry:--commit (fornication).
porneia
porneia porneia por-ni'-ah
from 4203; harlotry (including adultery and incest); figuratively, idolatry:--fornication
1Corinthians 7:2 (KJV) Nevertheless, to avoid fornication, let every man have his own wife, and let every woman have her own husband.
Colossians 3:5 (KJV) Mortify therefore your members which are upon the earth; fornication, uncleanness, inordinate affection, evil concupiscence, and covetousness, which is idolatry:
(concupiscence just means unbridled sensuality)
Speaking of Jezebel...
Revelation2:21 (KJV) And I gave her space to repent of her fornication; and she repented not.