No. 4,506 in Polish
kopalniach
"Mine" (plural, locative case) - refers to places where minerals are extracted.
In a sentence
Pracowałem kiedyś w kopalniach węgla kamiennego.
I once worked in coal mines.
The word 'kopalniach' refers to the plural locative case, meaning 'mines' in a context describing a location or setting where actions occur.
W kopalniach można znaleźć różnorodne minerały.
Various minerals can be found in mines.
Here, 'kopalniach' indicates a locative sense to describe where the minerals are found.
Warunki pracy w kopalniach są trudne.
Working conditions in mines are tough.
This usage of 'kopalniach' emphasizes the location of the challenging work conditions, again using the plural locative case of 'kopalnia'.
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