| unwavering(adjective, determined, steady, definite, resolute) |
| obstinate(adjective, mean, strong, hard, tough) |
| unbendable(adjective, determined, resolute, obstinate, uncompromising) |
| adamant(adjective, mean, strong, hard, secure) |
| unshakeable(adjective, determined, resolute, uncompromising) |
| steady(adjective, clear, strong, secure, solid) |
| hard-nosed(adjective, mean, hard, secure, determined) |
| unfaltering(adjective, clear, firm, solid, certain) |
| set in stone(expression, adjective, idiom, mean, hard) |
| unswerving |
| persistent(adjective, strong, tough, firm, determined) |
| tenacious(adjective, strong, tough, firm, determined) |
| constant(adjective, firm, certain, steady, definite) |
| dogged(adjective, mean, strong, hard, tough) |
| hanging tough(expression, adjective, mean, hard, determined) |
| pertinacious(adjective, tough, firm, determined, resolute) |
| solid(adjective, strong, hard, secure, tough) |
| stable(adjective, strong, hard, secure, continue) |
| standing pat(adjective, determined, resolute, obstinate, uncompromising) |
| staunch |