betroth , engage , affiance , plight (verb) - give to in marriage
pledge , plight (verb) - promise solemnly and formally; "I pledge that will honor my wife"
predicament , quandary , plight (noun) - a situation from which extrication is difficult especially an unpleasant or trying one; "finds himself in a most awkward predicament"; "the woeful plight of homeless people"
plight , troth (noun) - a solemn pledge of fidelity