General "in", "into" or "within" meaning:
* Enclose: To surround or shut in.
* Encase: To enclose in a case or covering.
* Endorse: To support or approve of.
* Entice: To attract or tempt.
* Entrain: To carry along or draw into.
* Enter: To go or come in.
* Engage: To participate in or become involved with.
* Encircle: To surround or enclose.
Words with specific meanings:
* Encyclopedia: A book or set of books containing a summary of knowledge.
* Energy: The ability to do work.
* Enthusiasm: Intense interest or excitement.
* Enumerate: To list or count.
* Enigma: A puzzling or mysterious person or thing.
* Enmity: Hatred or ill will.
* Envision: To imagine or picture in the mind.
* Environment: The surroundings or conditions in which a person, animal, or plant lives.
Remember:
* "En" can also be part of compound words.
* The prefix "en-" can also have a different meaning, such as "make" or "cause to be."
I hope this list is helpful!