I'm preparing for an exam which will test the candidate's ability to identify different parts of speech. I know a word can work as different parts of speech based on its meaning in the sentence. But what if I don't know the exact meaning of a certain word.
As an example,
Depression is often hereditary.
In the above sentence, the word hereditary is an adjective. I didn't know the exact meaning of this word and I was quite sure that it was a noun when I first saw the question.
So is there any way to identify an adjective which works every time?