This is the 12558th most frequent Swedish word.
slätare
"Smoother."
Here, "slätare" is used as a comparative adjective to compare the smoothness of the table's surface before and after sanding.
Ytan på bordet blev slätare efter att vi slipade det.
The surface of the table became smoother after we sanded it.
In this sentence, "slätare" is employed to describe the change in texture of her hair, indicating a comparative smoothness.
Efter att ha använt balsam blev hennes hår mycket slätare.
After using conditioner, her hair became much smoother.
"Slätare" is utilized here to indicate the comparative improvement in smoothness caused by the brushstrokes on the painting.