Today's word: Pervicacious

It has been a while that i posted a "word of the moment" today I learned that there are other words to tell a person that he or she is headstrong. I know I have been called stubborn, but I have never heard a person say to me "you are pervicacious". Although I think my girlfriend would use such a word on me..

pervicacious \puhr-vih-KAY-shuhs\, adjective:
Refusing to change one's ideas, behavior, etc.; stubborn; obstinate.

I think when I want to sound smart and stuff I need to say this to some one instead....