unraceable

English

Etymology

From un- +‎ raceable.

Adjective

unraceable (comparative more unraceable, superlative most unraceable)

1. Not raceable; unsuitable for racing.
   • 2011, Walter Farley, The Black Stallion Mystery:

     If it wasn't for Alec the Black would be unraceable. Now he gets mad only when Alec leaves without him.