hard as iron
Tough beyond measure
Hard as iron describes something extremely firm, solid, or unyielding.
The phrase compares physical hardness to iron's resistance to bending or denting: The frozen ground was hard as iron.
It extends to people who are tough, unfeeling, or resolute: She had a hard-as-iron determination to succeed.
- steelCarbon-hardened iron alloy
- nerves of steelExceptional calm under pressure
- rigidUnable to bend
- rock solidUtterly reliable and stable
- solidFirm matter state
stoic · adamantine · grit · indomitable · fortitude · diamond · armor · built like a tank · unbending · steadfast · granite · perseverance · unwavering · titanium · anvil · resolute · determined · courageous
hard as ironsoft as butter
soft as silk · pliable · malleable · yielding · spongy
hard as ironspineless
Lacking courage or resolve
weak-willed · wishy-washy · soft · pliable · malleable
hard as ironweak-willed
Lacking determination or resolve
spineless · soft-hearted · tender-hearted · wishy-washy · fragile
hard, harder, hardest, hardly, harden, hardened, hardening, hardness, hardy