We cry while peeling or chopping onions because they contain a mild acid that hurts our eyes. When in kitchen, it is best to ask for hacks from your granny. A commonly used way to prevent tearing when chopping onions is to keep them dipped in water for a while. Just remove the outer-most peel before you dip them in water. What happens is that the mild acid gets diluted in water and your problem gets solved. I have used this hack since ages and it has never failed. I hope now there will be no more crying in your kitchen because of cutting onions.