Winston Churchill said: “Broadly speaking, the short words are the best, and the old words best of all.”
He was right.
Short words are best because they don’t get in the reader’s way. They are familiar.
This makes them easy to understand and easy to spell.
They are also easier to pronounce
Most short words in modern English come from Anglo-Saxon, not Latin, roots.
They mainly describe real world objects and actions, not abstract concepts.
Short words get straight to the point.