* Adjective: Describing something that is not visible or easily found.
* Example: "The treasure was hidden in the old tree."
* Verb (past participle): Used as part of a verb phrase, often with "has", "have", or "had".
* Example: "The clues have been hidden well."
* Past participle used as an adjective: Describing something that is concealed or kept secret.
* Example: "The hidden camera caught the thief."
It's important to look at the context of the sentence to determine the correct part of speech for "hidden".