blanch
/blɑːntʃ/verb
1
- with obj. make white or pale by extracting colour; bleach使变白, 漂白; 使苍白：
the cold light blanched her face.
冷色的光使她的脸显得苍白。
1.1
- with obj. whiten (a plant) by depriving it of light使（植物）不见阳光而变白。
1.2
- no obj. figurative (of a person) grow pale from shock, fear, or a similar emotion〈喻〉（吓得）脸色煞白：
many people blanch at the suggestion
听到这个建议, 很多人脸都吓白了
their faces blanched with fear.
他们的脸吓白了。
2
- with obj. prepare (vegetables) for freezing or further cooking by immersing briefly in boiling water焯, 把（蔬菜）用沸水烫一下（再冷藏或烹饪）。
2.1
- often as adj. blanched peel (almonds) by scalding them用沸水烫（杏仁）以便去皮。
词源
Middle English: from Old French blanchir, from blanc 'white', ultimately of Germanic origin.