Webster's Revised Unabridged Dictionary · 1913

Betroth

Betroth ({not transcribed}) , transitive verb

[Prefix be- + troth, that is, truth. See Truth.]

1.
To contract to any one for a marriage; to engage or promise in order to marriage; to affiance; -- used esp. of a woman.
He, in the first flower of my freshest age, Betrothed me unto the only heir. — Spenser
Ay, and we are betrothed. — Shakespeare
2.
To promise to take (as a future spouse); to plight one's troth to.
What man is there that hath betrothed a wife, and hath not taken her? — Deut. xx. 7
3.
To nominate to a bishopric, in order to consecration. — Ayliffe