faithlessly
/'feɪθlɪslɪ/in a disloyal and faithless manner; "he behaved treacherously" "his wife played him false"
adverb [方式副词]靠不住地；不忠实地
He faithlessly forsook his friends in their hour of need.
在最需要的时刻他背信弃义地抛弃朋友。
单词造句:
He faithlessly forsook his friends in their hour of need.
在最需要的时刻他背信弃义地抛弃朋友。