expression, godan verb (-ru)
skim off scum; remove impurities from a liquid
Used in cooking to describe removing foam or scum that rises to the surface when simmering broth, soup, or other liquids.
See also: アク
煮立ったらアクを取ってください。
Once it boils, please skim off the scum.
このスープはアクを取ると澄
This soup becomes clear-tasting when you remove the scum.