What is the prefix of bewilderment?

There isn't a specific prefix for "bewilderment." The word "bewilderment" is a noun, meaning a state of confusion or perplexity.

It's derived from the verb "bewilder," which itself doesn't have a prefix. The root of "bewilder" is likely from the Old English word "wilder," meaning "to mislead" or "to make wild," which is a fascinating connection to the meaning of the word!