Wiz
Definition 1 of 2

Context
Use 'wiz' in informal contexts to describe expertise.

He’s a wiz when it comes to programming.
Nuance
Be aware that 'wiz' can have playful connotations.

You’re such a wiz; you make coding look easy!
Formality
Use 'wiz' in casual conversations rather than formal writing.

She’s a wiz with kids.
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