The outer edge or crust of a loaf of bread.

A metaphorical use referring to something hard or tough in a situation.

कठोरता या कठिनाई

English Usage: She has a tough bread-crust in negotiations; she doesn’t back down easily.

Hindi Usage: उसकी बातचीत में ब्रेड की परत जैसी कठोरता है; वह आसानी से पीछे नहीं हटती।