If you blanch vegetables, fruit, or nuts, you put them into boiling water for a short time, usually in order to remove their skins, or to prepare them for freezing.
1. ash-colored or anemic looking from illness or emotion;
"a face turned ashen""the invalid's blanched cheeks""tried to speak with bloodless lips""a face livid with shock""lips...livid with the hue of death"- Mary W. Shelley"lips white with terror""a face white with rage"
2. (especially of plants) developed without chlorophyll by being deprived of light;