obey: [13] ‘To hear is to obey’ carries more than a germ of etymological truth. For obey comes via Old French obeir from Latin ōbēdīre, which meant literally ‘listen to’. It was a compound verb formed from the prefix ob- ‘to’ and audīre ‘hear’ (source of English audible). By classical times the metaphorical sense ‘obey’ had virtually taken over from the original ‘listen to’, and it is this sense that informs the related obedient [13] and obeisance [14]. => audible, obedient[obey etymology, obey origin, 英语词源]