...it is a "holy day",the words from which "holiday" is deri

是一个定语从句
Indeed, whatever shopkeepers gain out of Christmas, it is still a "holy day" ,the words from which "holiday" is derived, and it gives people time to pause and coacentrate for moment on non-commercial values.
这里 the words 是 "holy day" 的同位语.在the words from which "holiday" is derived 中,the words 是先行词,which是引导词,结构为 "holiday" is derived from the words.