This is the 10454th most frequent Swedish word.
klur
"Klur" in Swedish refers to a tricky or clever problem, puzzle, or challenge.
In this context, 'klur' is used to indicate a challenging or difficult problem, likened to a puzzle.
Det är en riktig klur att lösa det här problemet.
It's a real puzzle to solve this problem.
Here, 'klurig' (derived from 'klur') denotes someone who is clever or creative, usually in a positive sense.
Han har alltid varit klurig när det gäller att hitta lösningar.
He has always been clever in finding solutions.
In this sentence, 'klurande' (a noun form of the activity of pondering) is used to describe the act of thinking deeply or carefully about something.