This is the 4298th most frequent Dutch word.
blätter
"Blätter" is not a Dutch word; it's German and means "leaves" (as in foliage or paper sheets).
Here, 'blättert' is used to indicate the action of flipping through pages of a book.
De jongen blättert door het oude boek.
The boy flips through the old book.
In this context, 'blätteren' describes the movement or rustling sound of leaves in the wind.
De bladeren blätteren in de wind.
The leaves rustle in the wind.
Here, 'blätter' refers to sheets of paper or other flat objects.