* Verb (past participle): This is the most common usage. Example: "The bird was trapped in the cage."
* Adjective: This describes something that is caught or confined. Example: "The trapped miners were finally rescued."
* Noun: This is less common, but can refer to someone who is caught or confined. Example: "The trapped called for help."
To determine the correct part of speech, you need to look at its function within the sentence.