troth

 
Pronunciation: /trəʊθ, trɒθ/

noun

[mass noun]
  • 1 archaic or formal faith or loyalty when pledged in a solemn agreement or undertaking: a token of troth
  • 2 archaic truth.

Phrases

pledge (or plight) one's troth

make a solemn pledge of commitment or loyalty, especially in marriage: I solemnly pledge my troth I watched her plight her troth to him in December they will plight their troth at the register office

Origin:

Middle English: variant of truth