This is the 12586th most frequent Swedish word.
smör
Butter.
The word 'smör' in this sentence is used as a noun to denote butter.
Jag köpte smör för att baka en kaka.
I bought butter to bake a cake.
Here, 'smöret' is the definite form of 'smör', meaning 'the butter', used with a definite article.
Kan du ge mig smöret som står på bordet?
Can you give me the butter that is on the table?
In this sentence, 'smör' is used in a comparison, stating that the taste of the sauce resembles that of butter.