这些词汇很多都是作者自创的词语，当然符合欧洲词汇学的固定模式

【不可饶恕咒】Avada Kedavra 

         它是依据亚拉姆语创建的，这种语言被认为是耶稣基督时代的犹太人的日常用语，新约中的马太福音（玛窦福音）即是以此语言书写。与希伯来语和阿拉伯语相近。Aramaic一词来自挪亚的孙儿、闪的儿子亚兰（Aram）。Aramaic语为 אַבַדָא כְּדַברָא，咒语的意思是"let the thing be destroyed"让某物毁灭。

      作者谈到该词的词源"Does anyone know where avada kedavra came from? It is an ancient spell in Aramaic, and it is the original of abracadabra, which means 'let the thing be destroyed.' Originally, it was used to cure illness and the 'thing' was the illness, but I decided to make it the 'thing' as in the person standing in front of me. I take a lot of liberties with things like that. I twist them round and make them mine."

    ^{abracadabra [ˌæbrəkəˈdæbrə] int. 咒语；无稽之谈；（魔术师表演时的）念词；高级特技飞行。这个词源自希腊语}Abraxas，是诺斯替教（ cabalistic or gnostic ）的最高神的名字，常常写成三角形戴在手上或脖子上。十五世纪时写做ananizapta.

     "Kedavra"的发音类似英文单词”cadaver尸体“，由拉丁文 cadere, "to fall."引申出的一个单词。意思是”corpsen. 死尸，尸体 “