What part of speech is The word upset?

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

* Adjective: Describing a state of being. Example: "She was upset about the bad news."

* Verb: To disturb or distress someone emotionally. Example: "The noise upset the baby."

* Noun: A disturbance or disorder. Example: "The political upset shocked everyone."

To determine the part of speech, look at the context of the sentence and how the word is used.