It's very difficult! but I think it should be "hexad", and "hex" left when we take away the last two letters.
一个什么样的五个字
的词，当你拿掉两个字后还有
个剩下？
词条纠错
X
hexad
n. 
个一组,价原子
个一组,价原子声明：以上例句、词性分类均由互联网资源自动生成，部分未
工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。
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相似单词
hexacosanol, hexact, hexactin, Hexactinellida, Hexactinosa, hexad, hexadactylia, hexadactylism, hexadactyly, hexadcadrol,
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