plight your troth pledge your word in marriage or betrothal.
☞ The verb plight is now virtually obsolete except in this particular phrase, as is the noun troth.
英语词组固定搭配大全包含15956条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。