Unfazed (adjective)

Not disturbed or upset by something.

Origin:

Late 19th century: from un- (expressing negation) + fazed, from phase.

Examples:

1. She remained unfazed despite the news of her husband's infidelity.
2. He remained unfazed by the challenging conditions, determined to complete the race.
3. The veteran soldier was unfazed by the explosions and gunfire, calmly making his way through the battlefield.
4. The actress was unfazed by the harsh criticism from the press, remaining confident in her performance.
5. The strong storm didn't faze the determined fisherman, who continued to cast his line.