be ‧ trothed /bɪˈtrəʊðd $ -ˈtroʊðd/ BrE AmE adjective old-fashioned
[ Date: 1300-1400 ; Origin: troth 'truth, promise' (13-19 centuries) ; ⇨ ↑ troth ]
1 . be betrothed to somebody to have promised to marry someone
2 . sb’s betrothed the person that someone has agreed to marry
—betroth verb [transitive]