Unflinching (adjective)

Firm and resolute in one's determination or attitude; not shrinking from danger or pain.

Origin:

From the late middle english word "unflenchen" meaning "not to flinch or shrink away".

Examples:

1. He remained unflinching in the face of danger.
2. She was unflinching in her commitment to social justice.
3. The soldier's unflinching bravery earned him a medal of honor.
4. He faced the firing squad with unflinching resolve.
5. She remained unflinching even as the storm raged around her.