हल्का उबालना  =  boil
To put into boiling water for a few minutes, to whiten, to remove skins, to get rid of strong flavours, or to prepare for freezing/ drop the tomatoes into the boiling water and blanch them for 20 to 30 seconds.

सफेद पड़ ना
To become pale because of fear, shock, etc / she blanched visibly when i told her the news.