* Verb: "Put up" is the most common use, functioning as a phrasal verb. This means it acts as a single verb, even though it's composed of two words. Examples:
* "Please put up the decorations."
* "We put up a fight, but we lost."
* Noun: It can be a noun, meaning a fraud or a sham. This is less common than the verb use.
* "That whole story about the lottery win was a put-up."
* Adjective: It's possible, though rare, for it to be an adjective meaning set up or prepared, usually used in the context of a "put-up job."
* "This whole operation is a put-up job."
To determine the part of speech, consider the context of the sentence and how the word is used.