oscuridad
darkness
obscure
dark, unclear
+
-idad
noun suffix (state or quality)
Oscuridad means darkness and is related to the English word obscure0. It's formed by adding the noun suffix indicating a state or quality1 (-idad1) to the root 'oscur-'.
noun
- darknessdarkness, absence of lightLa oscuridad de la noche era total. // The darkness of the night was complete.