Early 17th century; earliest use found in John Florio (1553–1625), author and teacher of languages. From ruff + -er.
Mid 19th century; earliest use found in Andrew Ure (1778–1857), chemist. Either a variant of rougher, or from ruff + -er.
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。