inscrutable [LME] Inscrutable is from ecclesiastical Latin inscrutabilis, from in- ‘not’ and scrutari ‘to search’ also found in scrutiny [LME].
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。