hive (OE hýf) is from the PIE root *k'eu-p-. *k'eu- 'to bow, bend, curve' with different augmentations gives L cubo 'to lie', Gk kuphos 'hump, hunch', (< *k'eu-bh-) L cumbo 'to lie', Welsh cwm, English hump via Scandinavian (< *k'eum-b(h)-). The unaugmented *k'eu- yields L cavus 'hollow, concave, vaulted' and many more (there are over three pages in Pokorny).