That does what is right or proper.
Old English; earliest use found in The Blickling Homilies. From right + doing, present participle of do. In later use after wrong-doing, rightdoing.
英语词典包含464360条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。