balky

adjective, balk·i·er, balk·i·est.

1. given to balking; stubborn; obstinate: a balky mule.

adjective balkier, balkiest, baulkier or baulkiest

1. inclined to stop abruptly and unexpectedlya balky horse

adj.

1847, from balk (n.) + -y (2). Related: Balkily; balkiness.