Inexpedient. Whatever in the long run and with regard to the greater number of instances men find to be generally inexpedient comes to be considered wrong, wicked, immoral. If man's notions of right and wrong have any other basis than this of expediency; if they originated, or could have originated, in any other way; if actions have in themselves a moral character apart from, and nowise dependent on, their consequences -- then all philosophy is a lie and reason a disorder of the mind.

Not moral; inconsistent with rectitude, purity, or good morals; contrary to conscience or the divine law; wicked; unjust; dishonest; vicious; licentious; as, an immoral man; an immoral deed.

violating principles of right and wrong

marked by immorality; deviating from what is considered right or proper or good; "depraved criminals"; "a perverted sense of loyalty"; "the reprobate conduct of a gambling aristocrat"

Unlawful or improper relations of a sexual nature