* Noun: It can be a noun referring to the final point or limit of something. For example, "The end of the road is just ahead."
* Verb: It can be a verb meaning to bring something to a conclusion. For example, "The meeting ended at 5 pm."
* Adjective: It can be an adjective meaning being at the final point or limit. For example, "This is the end seat on the train."
To understand the specific word form of "end," you need to look at how it is used in a sentence.