Source : Webster's Revised Unabridged Dictionary (1913)

Balky \Balk"y\ (b[add]k"[y^]), a.
   Apt to balk; as, a balky horse.

Source : WordNet®

balky
     adj : stopping short and refusing to go on; "a balking"; "a balky
           mule"; "a balky customer" [syn: {balking}]
     [also: {balkiest}, {balkier}]