To be engaged.

And in that day will I make a covenant for them with the beasts of the field, and with the fowls of heaven, and with the creeping things of the ground: and I will break the bow and the sword and the battle out of the earth, and will make them to lie down safely. And I will betroth thee unto me for ever; yea, I will BETROTH thee unto me in righteousness, and in judgment, and in lovingkindness, and in mercies. ( Hosea 2:18-19 )

Dictionary of Words from the King James Bible. Public Domain. Copy freely.