What part of speech is known?

"Known" can be several parts of speech depending on how it's used in a sentence:

* Adjective: Describing a noun. Example: "The answer is known to everyone."

* Past Participle: Used to form the passive voice or as part of a perfect tense. Example: "The book has been known for its beautiful illustrations."

* Verb: Used as the past participle of "know". Example: "He known the answer all along."

To determine the part of speech, you need to look at its function in the sentence.