This is the 15668th most frequent German word.
zerbröselte
"Zerbröselte" means "crumbled" or "fell apart into crumbs."
In this sentence, 'zerbröselte' is used reflexively to describe the bread breaking into crumbs due to its fragility.
Das Brot zerbröselte in seiner Hand.
The bread crumbled in his hand.
Here, 'zerbröselte' is applied figuratively to describe the weakening or disintegration of her argumentation.
Meines Erachtens zerbröselte ihre Argumentation unter den kritischen Fragen.
In my opinion, her argumentation crumbled under the critical questions.
This usage of 'zerbröselte' portrays the natural breaking apart of the cookie as an inherent characteristic.