This is the 4041st most frequent Russian word.
мельника
The Russian word "мельника" is the genitive singular or accusative singular form of "мельник," which means "miller" (a person who operates a mill).
Here, 'мельника' is the genitive singular form of 'мельник', used to indicate the person I met.
Я встретил мельника на рынке.
I met a miller at the market.
In this context, 'мельнике' is used in the prepositional case to indicate the subject of a story.
Рассказ о мельнике мне очень понравился.
The story about the miller pleased me greatly.
Here, 'мельнику' is in the dative singular form, used to indicate the recipient of the action.