be·troth·al 
/bɪˈtroʊðəl/ noun
plural be·troth·als /bɪˈtroʊðəl/ noun [count] formal + old-fashioned 1 : the act of promising to marry someone : engagement
▪ They kept their betrothal a secret. [=they told no one that they were engaged to be married] 2 : an agreement that two people will be married in the future
▪ They were both young at the time of their betrothal.
▪ They kept their betrothal a secret. [=they told no one that they were engaged to be married]
▪ They were both young at the time of their betrothal.
