Translation of "Adamant" in Japanese

I'm adamant that you should go.

君に行ってもらわねば承知しない。

He was so adamant in his refusal.

彼は断固として拒絶した。

I am adamant that he undertake it.

彼が引き受けるべきだという私の考えは不動だ。

Bill was adamant that she should obey him.

ビルは絶対に彼女が彼に従うべきだと譲らなかった。

- Bill was adamant that she should obey him.
- Bill did not say that she should obey him no matter what.

ビルは絶対に彼女が彼に従うべきだと譲らなかった。