This is the 456th most frequent German word.
herbst
"Herbst" means "autumn" or "fall" in English.
Here, 'Herbst' is used as a noun referring to the season of autumn.
Im Herbst färben sich die Blätter bunt.
In the autumn, the leaves change to colorful shades.
'Herbst' is again a noun denoting the season, serving as the subject of the sentence.
Der Herbst bringt kühles Wetter mit sich.
Autumn brings cool weather.
The noun 'Herbst' is used in a prepositional phrase ('im Herbst') to set a time context.