Oh. Leonard, don't trouble yourself.
He's STUBBORN.
The Big Bang Theory Season 1, Episode 4
STUBBORN people
who are not open to suggestions.
The Big Bang Theory Season 5, Episode 16
Your father was a STUBBORN old ox.
Game of Thrones Season 3, Episode 3
If you weren't so
STUBBORN and so drunk,
Vikings Season 1, Episode 8
She's sullen and STUBBORN and sinful.
Game of Thrones Season 4, Episode 2