adjective
Sudden is an adjective.
The word "you" belongs to the pronoun word class, particularly as a second person singular pronoun. It is used to refer to the person or people being spoken to.
Ornithologist.
preposition
The word "saw" can be both a verb (past tense of see) and a noun (a tool used for cutting).
The word "prime" can belong to multiple word classes. As an adjective, it describes something of the best quality or importance (e.g., "prime example"). As a noun, it refers to a prime number or a state of being prime. Additionally, it can function as a verb, meaning to prepare or make ready (e.g., "to prime a surface").
it's a preposition
Adjective
Sudden is an adjective.
It falls into the action category
If you mean the part of speech, it is a noun. If you mean the etymology, it comes from Greek.
The word "you" belongs to the pronoun word class, particularly as a second person singular pronoun. It is used to refer to the person or people being spoken to.
Ornithologist.
Tigers belong to Class Mammalia.
Opossums belong to the class mammalia.
preposition
The word "saw" can be both a verb (past tense of see) and a noun (a tool used for cutting).