Obdurate

adj.

1. stubborn; unyielding

2. hardened against good influence; impenitent

Synonyms

relentless

tough

unbending

Antonyms

submissive

susceptible

yielding

Sentences

The man's obdurate behavior caused him to loose his job after refusing to do a task he though was below him.

The young child's obdurate demeanor made it hard to make friends because he would never play their games.

Stubborn people