He's young, very headstrong, but he's a good man underneath.

他年轻、任性，但骨子里是个好人。

《柯林斯英汉双解大词典》

She is a very headstrong foolish girl, and does not know her own interest;

她是个固执的傻姑娘，不明白好歹；

youdao

She is a very headstrong foolish girl, and does not know her own interest; but I will make her know it.

她是个固执的傻姑娘，不明白好歹；可是我会叫她明白的。

youdao

The saga continued last year with New Moon,and now in Eclipse, headstrong high school student Bella Swan affirms her love for classmate Edward Cullen, a soulful and very pale teenager.

VOA: standard.2010.07.07

Mr Unwin described his wife as "very, very independent" and "headstrong".

BBC: Ona Mary Unwin