A wordy sentence contains a lot of words and is very long. If you want to shorten that sentence, you will have to read it carefully and look for words that are repeated, or have similar/same meanings, or are just unnecessary because they don't contribute to the sentence. When you eliminate those redundancies, you will fix your lengthy sentences.
Redundancy by definition is: <em>"the state of being not or no longer needed or useful"</em>. When it comes to writing, it is often used to describe a term or sentence that is describing or informing something already seen before.
"The blue car is blue" is an obvious example, but "The blue car is of the same color of the sky" is a more subtle example of it. If you want objective clarity, there's no need for such a thing.
