year,from PIE root *yer- "year,season"“年,季节”,我觉得不是从属y,光明之属,日居月诸。就是ei-衍那属走,车乘(也许是太阳车),人生如辙,
而annual,from PIE *at-no- "whichgoes哪一个,"also "a year" (as "going around去往一周"), suffixed form后缀形式 of root *at- "togo",
和op,ap好多含有连接的印欧语概念相通,现代英语可能有art,arm?可能有传说中米德加德,这些宇宙大蛇,舍沙蛇王首尾相衔的概念,和苯环同属。周而复始。中文啥联系,可能是迫,毗,比吗?