This meaning refers to a person who knows how to do something very well. It is often used for skills or arts. It means an expert or someone who is very good at a task.
She is an adept at playing the piano.
He became an adept in computer coding.
This describes a person or sometimes a thing that has very good skill or ability. It means being good or very skilled at something. It often appears before a verb with 'at'.
She is adept at solving puzzles.
He is adept in fixing machines.
This meaning refers to people who are masters in special or secret knowledge, often in historical or mystical groups. It is a formal or literary use.
The adepts of the old magic were mysterious.
He was one of the adepts in the secret club.
In very rare or old use, 'adept' can be used as an adverb to mean doing something in a skilled way. This usage is uncommon today but may be seen in literature.
He adeptly avoided the question.
She adeptly handled the problem.
This is a very rare and old use of 'adept' as a verb, meaning to become skilled in something. It is not used in modern English but may appear in historical texts.
He adepted new skills quickly (old use).
They adepted the art of war (archaic).