expression, noun
readiness to die; facing death with resolve
A set phrase expressing a firm determination to risk one's life, often used with 〜で to describe doing something in the face of death.
彼は決死の覚悟で戦場に向かった。
He went to the battlefield with a readiness to die.
決死の覚悟で救助に向かう隊員たち。
The rescue team members heading out with a resolve to face death.
Compound of 決死 (kesshi, 'determined to die') + の (possessive particle) + 覚悟 (kakugo, 'readiness, resolution'). The phrase is a fixed expression meaning 'readiness to die'.