there is no prefix or suffix for understand .

What is the prefix of understand?

The verb misunderstand adds the "bad" or "wrong" prefix mis- to understand, from an Old English root, understandan, that literally means "stand in the midst of."

What is a suffix word?

A suffix is a word ending. It is a group of letters you can add to the end of. a root word* e.g. walking, helpful. A root word stands on its own as a word, but you can make new words from it by adding beginnings (prefixes) and endings (suffixes).