This is the 2634th most frequent German word.
brüten
"Brüten" means "to brood" or "to incubate."
The verb "brüten" is used to describe the action of birds incubating their eggs, typically in a nest.
Die Vögel brüten in den Bäumen am Fluss.
The birds are nesting in the trees by the river.
The verb "brüten" is metaphorically applied to describe intense contemplation or worrying, often about a specific issue.
Er brütet über ein schweres Problem.
He is brooding over a difficult problem.
Here, "brüten" is used figuratively to depict the oppressive force of heat emanating from the sun on the fields.