Late 19th century; earliest use found in Littell's Living Age. From nid-nod + -ing.
Early 19th century; earliest use found in Susan Ferrier (1782–1854), novelist. From nid-nod + -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。