This is the 17486th most frequent Polish word.
zawalił
"Zawalił" means "collapsed" or "failed."
Here, 'zawalił' is used in the context of failing or not succeeding in an endeavor or activity.
On zawalił ważny egzamin.
He failed an important exam.
In this sentence, 'zawalił' refers to causing a collapse or destruction of a structure unintentionally.
Budowca zawalił ścianę przypadkiem.
The builder accidentally caused the wall to collapse.
Here, 'zawalił' metaphorically expresses that something caused failure or disarray in a conceptual framework, like plans.