Early 17th century; earliest use found in Samuel Collins (1576–1651), college head. From supererogate + -ing.
Late 16th century; earliest use found in Thomas Lodge (1558–1625), author and physician. From supererogate + -ing.
英语词典包含243303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。