betrothal
noun/bɪˈtrəʊðl/
/bɪˈtrəʊðl/
(formal or old-fashioned)- betrothal (to somebody) an agreement to marry somebody synonym engagementWord OriginFrom Middle English betreuthe: from be- (expressing transitivity) + truth. The change in the second syllable was due to association with troth + -al.
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betrothal