Oh. Leonard, don't trouble yourself.
He's STUBBORN.
The Big Bang Theory Season 1, Episode 4
I know how to deal
with STUBBORN children.
The Big Bang Theory Season 3, Episode 14
The free folk are STUBBORN.
Game of Thrones Season 5, Episode 8
If you weren't so
STUBBORN and so drunk,
Vikings Season 1, Episode 8
Oh, yeah. Those guys can be
very STUBBORN. What's the topic?
The Big Bang Theory Season 2, Episode 20