In such a process, the attached affix is called a categoriser, which carries an important piece of grammatical information, i.e. the categorial feature.

在这样的中，附加的词缀被称为词标记，它重要的语法信息，即词特征。

That in the process of derivation some words can be formed without changing the category of the base lexeme indicates that some derivational affixes do not have any categorial (grammatical) information.

派中有些词的形成不改变基础词位的词表明，有些派词缀没有任何词（语法）信息。

The nominal categoriser, -er, for example, not only provides a nominal categorial feature to a verbal lexeme, but also provides concrete semantic information, often denoting an agent who originates the event denoted by the verb.

例如，名词词标记-er不仅为动词词位提供名词性词特征，而且还提供具体的语义信息，通常表示发起动词所表示事件的代理人。