to betroth is a form of:

Betroth



verbpast tense: betrothed ; past participle: betrothed ; present participle: betrothing ;
1.
(TRANSITIVE) (To promise in marriage) ភ្ជាប់ពាក្យ (សន្យាថានឹងរៀបការជាមួយ) / ដណ្ដឹង, លើកស្លា
Example: The king betrothed his daughter to a prince.
ENGLISH MEANING
verbpast tense: betrothed ; past participle: betrothed ; present participle: betrothing ;
1.
(TRANSITIVE) To contract to any one for a marriage; to engage or promise in order to marriage; to affiance; -- used esp. of a woman.
2.
(TRANSITIVE) To promise to take (as a future spouse); to plight one's troth to.
3.
(TRANSITIVE) To nominate to a bishopric, in order to consecration.