coop
n.
"small cage for poultry," mid-14c., from Old English cype, cypa "basket, cask," akin to Middle Dutch kupe, Swedish kupa, and all probably from Latin cupa "tub, cask," from PIE *keup- "hollow mound" (see cup, n.).
v.
1560s, from coop, n.. Related: Cooped; cooping.