"I notice that you use plain, simple language, short words and brief sentences. That is the way to write English - it is the modern way and the best way. Stick to it; don't let fluff and flowers and verbosity creep in. When you catch an adjective, kill it. No, I don't mean utterly, but kill most of them - then the rest will be valuable. They weaken when they are close together. They give strength when they are wide apart. An adjective habit, or a wordy, diffuse, flowery habit, once fastened upon a person, is as hard to get rid of as any other vice."One of the more common failings in most writing is the use of a much bigger word than you need. Case in point: in my day job I see a lot of press releases with the word "utilize" in place of the word "use," among many other instances of similar overwrought wording. My sole theory about this is that we've been conditioned as a culture to believe that using a big word means you're smarter than the average person. A bigger vocabulary = a smarter person, in other words.
Now, we writers know that's not necessarily true. The best writing sometimes uses the simplest words, rather than the biggest, and is the better for it. An object lesson:
"He walked down the street." vs. "He perambulated down the avenue."
Both sentences say exactly the same thing. The second one, however, uses words that are more complicated than they might need to be. Granted, "perambulate" could refer to a specific kind of walk, but if all you want to say is that the man walked down the street then the first sentence is all you need to use.
In writing, it's always better to say what you need to say without using overblown words. Today on Twitter, RantyEditor referenced someone saying "We need to dialogue about this" instead of "We need to talk." That's another classic example of someone trying to sound smarter. All it does is make said person seem pompous. Of course, if you want your character to seem pompous, then by all means go that direction.
My point is this: don't use big words when you don't have to. Sending your readers scurrying to the dictionary every page or two is not a way to gain their loyalty. It's a way to alienate them. For the most part, at least.