So you think you're a true grammar snob? Do your friends say that you're a walking dictionary? Prove it by taking this ultimate English language test! Let's see if you truly know all of these tricky grammar questions. According to the Oxford Dictionary, the term "vocabulary" means "the words used by or known to a particular people" or, put more simply, "the words of a language." Some people like to impress others with their big vocabularies. Do you know the exact meanings of words like "conjure," "incumbent" and "seldom"? What about "venerable" or "conspicuous"? These are all words you probably don't use in your daily life -- but here they are in our quiz. So let's see how many difficult words you know! Ever wonder about your vocabulary size? Even if you are a daily English speaker or a native English speaker, you still might find this test challenging! We're rounded up some of the most confusing words in the English language to test your vocabulary and English prowess. This quiz will take you back to your grade school days and see how well you remember your vocabulary lessons. Think you'll be able to ace it? Or will you be begging for a retry? What are you waiting for? Grab a number 2 pencil and let's get started! Hit the play button now to take this ultimate English grammar test!