茹ゆでこぼす

godan verb (-su)

boil and discard the liquid

Cooking technique where ingredients are boiled and the water is thrown away, often to remove bitterness, astringency, or scum.

• たけのこは茹ゆでこぼしてあくを抜ぬきます。

  Boil the bamboo shoots and discard the water to remove the bitterness.