A belief or attitude that failure is inevitable and that efforts to succeed are futile.

हार मान लेने की धारणा

English Usage: His defeatism prevented him from trying new strategies in the competition.

Hindi Usage: उसकी हार मान लेने की धारणा ने उसे प्रतियोगिता में नई रणनीतियाँ आजमाने से रोक दिया।