This is the 10353rd most frequent Polish word.
ciemnym
The Polish word "ciemnym" means "dark" in English (used in the instrumental or dative singular form of "ciemny").
Here, 'ciemnej' (dark) describes the street, emphasizing its low light condition.
W tej ciemnej ulicy trudno znaleźć drogę.
In this dark street, it's difficult to find the way.
In this sentence, 'ciemną' (dark) characterizes the spot as having a dark color or characteristic.
Zauważyłem ciemną plamę na ścianie.
I noticed a dark spot on the wall.
Here, 'ciemne' (dark) refers to the appearance of the sky, likely indicating overcast conditions.