This is the 6983rd most frequent Polish word.
grinchuk
The word "grinchuk" does not appear to have a meaning in Polish; it may be a proper noun, misspelling, or borrowed term.
Here, 'Grinchuk' is used as a proper noun, specifically a name.
Grinchuk był znany jako zapalony kolekcjoner starych monet.
Grinchuk was known as an avid collector of old coins.
In this instance, 'grinchuk' is used as a common noun signifying a metaphorical term in a dialect or slang.
W mojej wiosce, 'grinchuk' oznacza kogoś, kto dużo narzeka.
In my village, 'grinchuk' means someone who complains a lot.
Here, 'Grinchuk' is used creatively as a fantastical or narrative name in the story.