What's the difference between i.e. and e.g.?
late 14c., from Old French elacion "elation, conceit, arrogance, vanity," from Latin elationem (nominative elatio), noun of action from elatus "elevated," form used as past participle of efferre, from ex- "out" + latus (see oblate (n.)), past participle of ferre "carry" (see infer). Metaphoric sense of "lifting spirits" was in Latin and has always been the principal meaning in English.