"and so on," 1990s, of echoic origin (compare yatata "talk idly, chatter," 1940s; and yatter "to talk incessantly or idly," 1825).
updated on October 10, 2017
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。