also o.b.o., abbreviation of or best offer, by 1969 in for-sale classified ads.
updated on July 26, 2019
英语词源词典收录了45867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。