Here's why:
* Verb: The base form of the word is "compel," meaning to force or oblige someone to do something.
* Past Participle: The past participle form of a verb can function as an adjective (e.g., "a compelled confession") or part of a verb phrase (e.g., "They were compelled to leave").
Let me know if you'd like to see examples of how "compelled" is used in sentences!