What is "surbating"

Surbate \Sur*bate"\, v. t. [imp. & p. p. Surbated; p. pr. & vb. n. Surbating.] [F. solbatu, p. p., bruised (said of a horse's foot); sole a sole (of a horse's foot) + battu, p. p. of battre to beat.]

1. To make sore or bruise, as the feet by travel. [Obs.]

   Lest they their fins should bruise, and surbate sore Their tender feet upon the stony ground.
   --Spenser.

   Chalky land surbates and spoils oxen's feet.
   --Mortimer.

2. To harass; to fatigue. [Obs.]
   --Clarendon.