Bróc

According to the Old English Dictionary:

es;

bróc

m? [bróc, p. of bracan] An inferior horse, a shaking horse, jade; caballus, equus vilior :-- Ðæt hie sécen him bróc on onráde, and on wǽne, oððe on ðon ðe hie á þrówian mǽgen that they look for themselves to ride on a horse, and in a wain, or in that which they can ever endure, L. M. 2, 6; Lchdm. ii. 184, 13. [Chauc. brok: Icel. brokkr, m.] broc