Here are examples of the word/phrase "adept" used in a sentence and paraphrased in a sentence...
How long did you train as a fighter to become so adept?
How long did you train as a fighter to become so skillful?
Ninjas are adept at throwing shuriken.
Ninjas are skillful at throwing shuriken.
Being very experienced is what makes them more adept.
Being very experienced is what makes them more skillful.
Other Examples...