Unshakable (adjective)

1. Firm and steadfast, not likely to change or be swayed.
2. Having confidence or trust that cannot be disturbed.

Origin:

From the latin word 'in' meaning 'not' and 'scatere' meaning 'to shake'.

Examples:

1. His unshakable faith inspired others.
2. Her unshakable determination helped her reach her goals.
3. His unshakable conviction led to his success.
4. Her unshakable commitment was admirable.
5. His unshakable loyalty was unwavering.