a stubborn or obstinate person; stubbornness — someone who refuses to change their mind or behavior easily.
彼は強情っ張りで、自分の間違いを認めようとしない。
He's so stubborn that he won't admit when he's wrong.
子どもが強情っ張りになると、話し合いで解決するのが難しい。
When a child is very obstinate, it's hard to resolve things through discussion.
強情っぱりという言い方はやや話し言葉的だが意味は同じだ。
The form '強情っぱり' is a more colloquial spelling, but it means the same thing.