defeatism

In a sentence

Objective assessment is good, but defeatism will reduce our potentials even when the prospects for victory have never been nearer.

वस्तुनिष्ठ मूल्यांकन अच्छा है, लेकिन पराजयवाद हमारी क्षमताओं को घटा देगा, भले ही जीत की संभावनाएँ कभी इतनी निकट न रही हों।