Reflexive words show that the person who does the action is also the person who is affected by it.

In the sentence "She prides herself on doing a good job", "prides" is a reflexive verb and "herself" is a reflexive pronoun. 在句子 She prides herself on doing a good job 中，prides 是反身动词，herself 是反身代词。

done because of a physical reaction that you cannot control

I hadn't meant to answer her, it was simply reflexive. 我本来不想回答她，但却本能地答了。