_____________ to a fault when his mind is made up, Jake has the backbone of a horse and the determination of a jet plane on a mission.

Although Julie has urged Hack many times to use his cellular phone in the car only with his hands-free speaker device, ________________ Jack continues to gab on his cell, leaving just one hand on the steering wheel.

The Labradoodle puppy was much more than a challenge to manage - she was _________________. Two-year-old Baci, however, who lounges around and sleeps most of the day, is ten times more docile and submissive.

You're so _____________ that your head must be made of cement and your mind must wear a sign that reads, "Close to Outside Ideas."

Once Brandon has his mind set, there's no changing it; he's an unwavering young man.

Intractable individuals are the easiest to control.

When it comes to homework, Mother is adamant about it getting done sometime after school or, perhaps, soon after dinner. Otherwise, Mom wants it finished by 11 PM.

An obstinate child is easily led by his peers.

Resolved to get her first children's book published, Lillian set aside a minimum of five hours a day for writing and marketing.