Here are examples of the word/phrase "skillful" used in a sentence and paraphrased in a sentence...
He is very skillful at what he does.
He is very adroit at what he does.
My students will become skillful after training with me.
My students will become adroit after training with me.
That martial arts master is too skillful to be defeated easily by any random fighter.
That martial arts master is too adept to be vanquished facilely by any desultory fighter.
Other Examples...