quartz [M18th] Quartz, a hard mineral consisting of silica, comes via German from Polish dialect kwardy, corresponding to Czech tvrdý ‘hard’.
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。