Meanings
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1
verb
to formally promise someone in marriage or become formally engaged to marry
The two families planned to betroth their heirs when both reached adulthood.
Thesaurus
Etymology
From Middle English bitrouthen, formed with be- from troth 'faith, pledged word, promise of marriage'. Troth descends from Old English treowth 'faithfulness, truth', so to betroth someone is historically to bind them by a pledge.