Webster’s Revised Unabridged Dictionary · 1913
Troth
Troth (trŏth; 115), 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.