Old English hyf "beehive," from Proto-Germanic *hufiz (source also of Old Norse hufr "hull of a ship"), from PIE *keup- "round container, bowl" (source also of Sanskrit kupah "hollow, pit, cave," Greek kypellon "cup," Latin cupa "tub, cask, vat;" see cup (n.)). Figurative sense of "swarming, busy place" is from 1630s.