This is the 2316th most frequent Russian word.
мастер
Master; craftsman; expert.
Here, 'мастер' refers to a skilled artisan or craftsman who performs repairs or creates items.
Мастер починил часы.
The craftsman repaired the clock.
In this sentence, 'мастер' is used to describe a person who is an expert or highly skilled in their profession or activity.
Она настоящий мастер своего дела.
She is truly a master of her craft.
In this context, 'мастер' denotes someone recognized as having a high level of ability or expertise, often formally acknowledged in a discipline such as chess.