Troth

Troth (?), n. [A variant of truth. See Truth.] 1. Belief; faith; fidelity.

Bid her alight

And hertroth plight. Shak.

2. Truth; verity; veracity; as, by my troth. Shak.

In troth, thou art able to instruct gray hairs. Addison.

3. Betrothal.