committed

We're very committed to the cause.我们对这项事业尽心尽力。

a committed environmentalist坚定的环保主义者

committed [=faithful] Christians虔诚的基督徒

I'm not married but I'm in a committed relationship. [=I'm in a serious and lasting romantic relationship with someone]我还没有结婚，但已经确定了稳定的恋爱关系。