Part of speech" refers to the category a word belongs to based on its function in a sentence. There are eight main parts of speech in English:
Noun – names a person, place, thing, or idea.
Example: boy, school, love
Pronoun – replaces a noun.
Example: he, she, it, they
Verb – shows action or state of being.
Example: run, eat, is, are
Adjective – describes a noun or pronoun.
Example: big, happy, blue
Adverb – describes a verb, adjective, or another adverb.
Example: quickly, very, well
Preposition – shows relationship between a noun/pronoun and other words.
Example: in, on, at, under
Conjunction – connects words or groups of words.
Example: and, but, or, because
Interjection – expresses strong feeling or emotion.
Example: wow! oh! hey!
If you give me a word, I can tell you its part of speech and how it's used