I. ˈrōch noun
( plural roach also roach·es )
Etymology: Middle English roche, from Anglo-French roche, rosse
Date: 13th century
1. : a silver-green European freshwater cyprinid fish ( Rutilus rutilus ) ; also : any of various related fishes (as some shiners)
2. : any of several American freshwater sunfishes (family Centrarchidae)
II. noun
Etymology: origin unknown
Date: 1794
1. : a curved cut in the edge of a sail to prevent chafing or to secure a better fit
2. : a roll of hair brushed straight back from the forehead or side of the head
III. transitive verb
Date: 1818
1. : to cut (as a horse's mane) so that the remainder stands upright
2. : to cause to arch ; specifically : to brush (the hair) in a roach — often used with up
IV. noun
Etymology: by shortening
Date: circa 1848
1. : cockroach
2. : the butt of a marijuana cigarette