Adjective:
* Meaning: Confused or unable to think of an answer or solution.
* Example: "I was stumped by the difficult math problem."
Verb (past participle):
* Meaning: To be brought to a halt or to be unable to proceed.
* Example: "The team was stumped by the opponent's aggressive defense."
Here are some clues to help you figure out which part of speech it is:
* Is it describing something? If yes, it's likely an adjective.
* Is it acting as the main verb in a sentence? If yes, it's likely a past participle acting as a verb.
* Does the sentence contain a helping verb like "was," "were," "have," or "has"? If yes, then "stumped" is likely a past participle acting as part of a verb phrase.
Let me know if you have a specific sentence in mind, and I can help you determine the part of speech of "stumped"!