I. ˈru̇k noun
Etymology: Middle English, from Old English hrōc; akin to Old High German hruoch rook
Date: before 12th century
: a common Old World gregarious crow ( Corvus frugilegus ) that nests and roosts in usually treetop colonies
II. transitive verb
Date: circa 1590
: to defraud by cheating or swindling
III. noun
Etymology: Middle English rok, from Anglo-French roc, from Arabic rukhkh, from Persian rukh
Date: 14th century
: either of two pieces of each color in a set of chessmen having the power to move along the ranks or files across any number of unoccupied squares — called also castle
IV. noun
Date: 1905
: rookie