1. Noun: This is the most common use of the word. It refers to a dessert made with layers of cake, custard, fruit, and cream.
* Example: "We had a delicious trifle for dessert."
2. Adjective: It can also be used as an adjective meaning "of little importance" or "unimportant".
* Example: "He was preoccupied with trifles while important matters were being discussed."
3. Verb: It's also used as a verb meaning "to waste time on something unimportant" or "to treat something with disrespect."
* Example: "Don't trifle with your health."
So, the part of speech for "trifle" depends on its context within a sentence.