This is the 3565th most frequent Swedish word.
fastställa
To establish or determine.
Here, 'fastställa' is used in the sense of determining or establishing a fact or cause through investigation or analysis.
Forskaren försökte fastställa orsaken till den ovanliga händelsen.
The researcher tried to determine the cause of the unusual event.
In this sentence, 'fastställa' means to legally rule or confirm the validity of a matter by official decision.
Domstolen har fastställt att kontraktet är giltigt.
The court has established that the contract is valid.
Here, 'fastställa' reflects the act of evaluating and discerning a medical conclusion.