This is the 1074th most frequent Swedish word.
orsaken
"Orsaken" means "the cause" or "the reason" in English.
Here, 'orsaken' is used as a noun meaning 'the reason' or 'the cause', referring to the reason behind the delay.
Orsaken till förseningen var det dåliga vädret.
The reason for the delay was the bad weather.
In this sentence, 'orsaken' is also used as a noun, specifically referring to the explanation linked to his decision.
Han försökte förklara orsaken till sitt beslut.
He tried to explain the reason for his decision.
'Orsaken' here is again a noun signifying 'the cause', used to describe the act of identifying the underlying reason for an issue.