词干与词相似，它是可以加词缀的任何一个词素或词素结合体。

An "affix" is the collective term for the type of formative that can be used, only when added to another morpheme (the root or stem).

youdao

南阳方言中有三个特殊的否定词“白”、“嫑”、“侯”，加词缀后构成三组否定词。

There are three special negative Chinese features "Bai", "Bao"and "Hou"in Nanyang dialect which can make three negative phrases when they are affixed.

youdao