Chopping an onion without crying is a completely realistic task.
We'll tell you what to lubricate your knife with to cut onions without tears.
How to Chop an Onion Without Tears
All you need to do to do this is grease the knife with olive oil.
Olive oil prevents the irritants contained in onions from evaporating.
If you don't have olive oil at home, put the onion in the refrigerator for half an hour before cutting.
Cooling also helps slow the evaporation of irritants from the onion.
Also, your eyes will water less if you use a sharp knife to cut onions.