What's the difference between i.e. and e.g.?
early 15c., "to flood, overflow," from Middle French soronder "to overflow, abound, surpass, dominate," from Late Latin superundare "overflow," from Latin super "over" (see super-) + undare "to flow in waves," from unda "wave" (see water (n.); and cf. abound). Sense of "to shut in on all sides" first recorded 1610s, influenced by figurative meaning in French of "dominate," and by sound association with round. Related: Surrounded; surrounding.