This is the 3098th most frequent Swedish word.
lööf
"Lööf" is not a standard Swedish word; it may refer to a surname, most notably associated with Swedish politician Annie Lööf.
In this sentence, 'lööf' is used to imply 'leaf', but it seems to be an accentuated or unusual spelling.
Jag hittade en lööf som föll från trädet.
I found a lööf that had fallen from the tree.
Here, 'lööf' might describe a unique interest or passion.
Min vän har en ovanlig lööf för att samla på gamla frimärken.
My friend has an unusual lööf for collecting old stamps.
'Lööf' appears to denote a specific trait or characteristic in this usage.