headstrongness

uncountable

The property of being headstrong, stubbornness.

Japanese Meaning

頑固さ / 意固地さ

Her headstrongness often made collaborative projects difficult, but it also drove her to achieve extraordinary results.

彼女の頑固さはしばしば共同作業を難しくしたが、それが彼女を突き動かして並外れた成果を上げさせることもあった。

Sense（1）

The property of being headstrong, stubbornness.