[with obj.](一般作 be betrothed)(dated)formally engage (someone) to be married (旧)与…订婚 in no time I shall be betrothed to Isabel. 很快我就要和伊莎贝尔正式订婚了。 [as noun betrothed]how long have you known your betrothed?. 你认识你未婚妻(或未婚夫)多久了?。
派生 betrothal noun 语源
Middle English betreuthe: from be-(expressing transitivity) + truthThe change in the second syllable was due to association with troth