Is it ensure, insure, or assure?
c.1500 hyvis "itchy condition of the skin," origin unknown. Some writers connect it with heave because hives erupt out from the skin, but the phonetics of that are difficult to explain.
Old English hyf "beehive," from Proto-Germanic *hufiz (cf. Old Norse hufr "hull of a ship"), from PIE *keup- "round container, bowl" (cf. Sanskrit kupah "hollow, pit, cave," Greek kypellon "cup," Latin cupa "tub, cask, vat"). Figurative sense of "swarming, busy place" is from 1630s. As a verb, of bees, etc., "to form themselves into a hive," c.1400; "to put bees in a hive," mid-15c.
To understand (1935+ West Point)