What's the difference between i.e. and e.g.?
early 14c., from Old French rethorique, from Latin rhetorice, from Greek rhetorike techne "art of an orator," from rhetor (genitive rhetoros) "speaker, orator, teacher of rhetoric," related to rhesis "speech," rhema "word, phrase, verb," literally "that which is spoken," from PIE *wre-tor-, from root *were- "to speak" (cf. Old English word, Latin verbum, Greek eirein "to say;" see verb).