Answer :

prefix- en, root- act, suffix- ment :)

The prefix is en-, the root is act, and the suffix is -ment.

A prefix is a part of a word which is added before the root word. It is always written with a dash (en-). A root word is the primary part of a word to which prefixes and suffixes are added. A suffix is a part of a word which is added after the root word. It is also always written with a dash (-ment).