This is the 16572nd most frequent Polish word.
wnuków
"Grandchildren" (genitive plural form).
The word 'wnuków' here appears in the genitive case, indicating possession or relation, connected with the action of 'taking care'.
Opiekowanie się wnuków sprawia mi przyjemność.
Taking care of my grandchildren brings me joy.
The word 'wnuków' here is the plural form of 'wnuczek', which itself means 'grandchild'. It indicates possession, as it follows the verb 'mam' (I have).
Mam dwoje wnuków.
I have two grandchildren.
In this example, 'wnuków' refers to grandchildren in the accusative case, demonstrating the direct object form.