This is the 8815th most frequent German word.
köpfe
"Köpfe" means "heads" in English.
Here, 'Köpfe' refers to the literal anatomical heads of people as a metaphor for their thoughts or ideas.
Die Köpfe der Menschen waren voller Ideen.
The people's heads were full of ideas.
In this sentence, 'Köpfe' is used to represent individuals by counting heads, a common metonymic usage.
Wir zählten die Köpfe der Besucher im Raum.
We counted the heads of the visitors in the room.
Here, 'Köpfe' refers to the heads of screws, showing a technical or mechanical application of the word.