ethic

the word 'ethic' entered english in the late middle english period via old french 'éthique' and latin 'ethica', from the greek phrase 'ēthikē tekhnē', meaning 'the science of morals'. the greek noun 'ēthos' originally signified 'accustomed place' or 'custom, habit', a meaning that evolved to encompass the intrinsic character or guiding beliefs of a person or group. this semantic shift from external custom to internal moral nature is central to the word's logic. the modern abstract sense, referring to a system of moral principles, retains this core link to the foundational idea of character and customary conduct.

the word 'ethic' is a simplex loanword. it is derived as a whole from the latin 'ethica' and greek 'ēthikē (tekhnē)', meaning 'the science of morals'. the greek root is 'ēthos', meaning 'character, custom, habit'.