n.【古】

1. 忠诚，忠实
2. 诺言，承诺；誓言
3. 订婚
   They plighted their troth for the rest of their days.

   他们俩盟誓结为终身伴侣。

4. 真实，事实
   In troth I think she would.

   的确，我想她会的。

vt.

1. 同……订婚

n.

1. archaic or formal faith or loyalty when pledged in a solemn agreement or undertaking.
2. archaic truth.