The word 'vague' is an adjective. An example of a sentence using the word is: He's not sure on the exact spot, but he has a vague idea of the area.
"His intentions were very vague."
When I interviewed the prisoner he was a little vague about his movements last night.
She avoided answering my questions and was intentionally vague.
I wish you would not be so vague about your plan: I really need specific details.
It is an adjective. ex: The vague boy went to the store If it was a noun the sentence would not make sense. The vague went to the store.
David made a vague gesture in the direction of the computer and returned to staring gloomily at his coffee.
"That desciption is too vague, you need to be more specific."my quiz was vague because of my hand writing
I am not writing a sentence using that word.
a sentence using the word endotracheal
This is a sentence using the word aviator.
I am saying a sentence using the word collagen.