The difference between Ethical and Unethical

When used as adjectives, ethical means of or relating to the study of ethics, whereas unethical means not morally approvable.

Ethical is also noun with the meaning: an ethical drug.

check bellow for the other definitions of Ethical and Unethical

Ethical as an adjective (philosophy, not comparable):

Of or relating to the study of ethics.

Examples:

"The philosopher Kant is particularly known for his ethical writings."
Ethical as an adjective (not comparable):

Of or relating to the accepted principles of right and wrong, especially those of some organization or profession.

Examples:

"All employees must familiarize themselves with our ethical guidelines."
Ethical as an adjective (comparable):

Morally approvable; good.

Examples:

"We are trying to decide what the most ethical course of action would be."
Ethical as an adjective (of a drug, not comparable):

Only dispensed on the prescription of a physician.

Examples:

"In most jurisdictions, morphine is classified as an ethical drug."

Unethical as an adjective:

Not morally approvable; morally bad; not ethical.

Examples:

"The corporation was accused of unethical behavior for knowingly producing a product suspected of harming health."