"order, good condition," in out of kilter (1620s), apparently a variant of English dialectal kelter (c. 1600) "good condition, order," a word of unknown origin.
updated on March 13, 2016
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。