This is the 1535th most frequent German word.
dunklen
"Dunklen" is the dative or accusative plural form of "dunkel," meaning "dark."
Here, 'dunklen' is used as an adjective describing the noun 'Wald', appearing in dative case due to the preposition 'im'.
Im dunklen Wald verstecken sich viele Geheimnisse.
In the dark forest, many secrets hide.
In this instance, 'dunklen' again serves as an adjective qualifying the noun 'Raum', using dative case following 'einem'.
Wir saßen in einem dunklen Raum und erzählten Geschichten.
We sat in a dark room and told stories.
Here, 'dunklen' functions as an attributive adjective modifying the plural noun 'Wolken', appearing in nominative case aligning with 'die'.