Je was op zoek naar: headstrong (Engels - Japans)

you are headstrong and inquiring.
キミは頑固で 好奇心旺盛

apparently michael's a little more headstrong than either of us imagined.
彼は私の治療を拒否した

such were the 'ad who denied the signs of their lord and disobeyed his messengers and followed the bidding of every headstrong enemy of truth.
これは，アード（の民のこと）であった。かれらは主の印を拒否し，かれの使徒たちに背き，それぞれの勢力者，頑迷な反逆者の命令に従った。