ajar [M16th] In this strange word a- ‘on’ is prefixed to obsolete char, which in Old English was cerr, meaning ‘a turn, return’.
英语词源词典收录了6069条英语词源词条，基本涵盖了全部常用英语词汇的起源、历史，是研究英语词汇或通过词源学英语的必备工具。