Read.More.Books.
You need to present your brain with more examples of the written word to help it learn how to assemble the words in your vocabulary in better or more meaningful ways.
If you broaden your vocabulary a little along the way, that's nice too.
General Jim Mattis: Call Sign Chaos: Learning to Lead Paperback
Lt Nate Fick: One Bullet Away: The Making of a Marine Officer
Red Blood, Black Sand: Fighting Alongside John Basilone from Boot Camp to Iwo Jima
Or something lighter and more entertaining: