Ethics

google

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late Middle English (denoting ethics or moral philosophy; also used attributively): from Old French éthique, from Latin ethice, from Greek (hē) ēthikē (tekhnē) ‘(the science of) morals’, based on ēthos (see ethos).

wiktionary

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From Middle English etik, from Middle French ethique, from Late Latin ethica, from Ancient Greek ἠθική(ēthikḗ), from ἠθικός(ēthikós, “of or for morals, moral, expressing character”), from ἦθος(êthos, “character, moral nature”).

etymonline

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ethics (n.)

"the science of morals," c. 1600, plural of Middle English ethik "study of morals" (see ethic). The word also traces to Ta Ethika, title of Aristotle's work. Related: Ethicist.