'Pledged' in the Bible

What man is there who has pledged to be married a wife, and has not taken her? Let him go and return to his house, lest he die in the battle, and another man take her."

If there is a young lady who is a virgin pledged to be married to a husband, and a man find her in the city, and lie with her;

But if the man find the lady who is pledged to be married in the field, and the man force her, and lie with her; then the man only who lay with her shall die:

for he found her in the field, the pledged to be married lady cried, and there was none to save her.

If a man find a lady who is a virgin, who is not pledged to be married, and lay hold on her, and lie with her, and they be found;