a monkey with a tin tool

a Determinative

— A is used when the following word could be any of a certain type. Compare "A book I saw on the shelf" and "The book I gave you yesterday".

a Noun

— A is the first letter of the alphabet. The letter "a" comes before "b". — In some schools, an A is a very high grade. Ron got an A on his earth science test.

monkey Noun

— A monkey is a primate with a long tail that climbs trees. We saw Vervet monkeys in the Zoo.

monkey Verb

— If you monkey something, you make changes to it. I foolishly monkeyed with the control panel and it ended up exploding.

with Preposition

— With is used to show the other people or things present when something happened I went to school with my brother. — With is used to describe something added to something else The cat has a collar with a bell on it. — With is used to show what thing is used to do something He hit the nail with a hammer. — Used to introduce non-finite and verbless clauses. With the children so sick, we weren't able to get much work done.

tin Noun

— The kind of metal that cans are frequently made with. It is the chemical element Sn. — A can; a metal thing with food in it.

tool Noun

— A tool is an object that you use to do a specific job, such as a hammer. I used to fix my own car, but I sold all my tools. — A tool is a person being used by another person or organization. He is such a tool. He should think for himself, instead of doing everything they tell him to do.