This is the 12710th most frequent Polish word.
niepełnosprawnego
"Niepełnosprawnego" means "of a disabled person" or "of someone with a disability" in English.
In this sentence, "niepełnosprawnego" is used as an adjective modifying "człowieka" (person), indicating the person's disability status.
Widzę niepełnosprawnego człowieka idącego do sklepu.
I see a disabled person going to the store.
Here, "niepełnosprawnego" is in the accusative case, used as an adjective describing the direct object of the verb "pomagam" (help).
Pomagam niepełnosprawnego w przejściu przez ulicę.
I am helping a disabled person cross the street.
In this example, "niepełnosprawnego" is in the genitive case, illustrating possession in relation to the noun "documents".