troth (trôth, trŏth, trōth)
b. One's pledged fidelity.
2. Good faith; fidelity.
tr.v. trothed, troth·ing, troths
To pledge or betroth.
[Middle English trouthe, trothe, variant of treuthe, from Old English trēowth, truth; see deru- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.