Lite engelsk etymologi
ethics
1602, "the science of morals," pl. of M.E. ethik "study of morals" (1387), from O.Fr. ethique, from L.L. ethica, from Gk. ethike philosophia "moral philosophy," fem. of ethikos "ethical," from ethos "moral character," related to ethos "custom" (see ethos). The word also traces to Ta Ethika, title of Aristotle's work. Ethic "a person's moral principles," attested from 1651.
moral (adj.)
c.1340, "pertaining to character or temperament" (good or bad), from O.Fr. moral, from L. moralis "proper behavior of a person in society," lit. "pertaining to manners," coined by Cicero ("De Fato," II.i) to translate Gk. ethikos (see ethics) from L. mos (gen. moris) "one's disposition," in pl., "mores, customs, manners, morals," of uncertain origin. Meaning "morally good, conforming to moral rules," is first recorded c.1386 of stories, 1638 of persons. Original value-neutral sense preserved in moral support, moral victory, with sense of "pertaining to character as opposed to physical action." The noun meaning "moral exposition of a story" is attested from c.1500. Moralistic formed 1865.
morality
c.1386, "moral qualities," from O.Fr. moralité, from L.L. moralitatem (nom. moralitas) "manner, character," from L. moralis (see moral (adj.)). Meaning "goodness" is attested from 1592.
"Where there is no free agency, there can be no morality. Where there is no temptation, there can be little claim to virtue. Where the routine is rigorously proscribed by law, the law, and not the man, must have the credit of the conduct." [William H. Prescott, "History of the Conquest of Peru," 1847]