determination; unwavering conviction
A somewhat formal or literary noun for firm, unshakable resolve. Often used in contexts of spiritual or moral steadfastness.
He faced the crisis with unwavering determination.
不退転の信念があれば、どんな困難も乗り越えられる。
With unshakable conviction, you can overcome any difficulty.
He tackled the new venture with unwavering determination.
The government showed its unwavering resolve toward reform.