ironclad
Impossible to break
Ironclad means protected by iron armor or, more commonly, so firm and unassailable that it cannot be broken or challenged.
An ironclad contract has no loopholes.
An ironclad alibi cannot be questioned.
An ironclad guarantee is absolute.
Historically, an ironclad was a 19th-century warship armored with metal plates—the source of the figurative sense of impenetrability.
Display or supervisor
- turretProtruding fortified structure
- casemateFortified gun enclosure
- armor platingDefensive metal cladding
- gunboatSmall armed naval vessel
broadside · steam engine · naval warfare · civil war · union · confederacy · blockade · shipbuilding
Enforceable written agreement
- guaranteeFormal promise of fulfillment
- commitmentFirm pledge to act
- pledgeBinding promise given
- promiseCommitment to act
binding · unbreakable · watertight · airtight · inviolable · covenant · oath · vow
Protected by metal covering
- impregnableImpossible to capture
- reinforcedMade more resistant
- fortressHeavily defended military structure
- strongholdFortified place of defense
bastion · citadel · bulwark · entrenched · defended · bunker · rampart · barricaded
Steady and unchanging
- steadfastFirmly loyal, unshakeable
- unyieldingRefusing to give way
- adamantStubbornly refusing to yield
- inflexibleUnable to bend
unshakeable · immovable · firm · tenacious · dogged · uncompromising · stubborn · obstinate
monitor
Display or supervisor
- turretProtruding fortified structure
- casemateFortified gun enclosure
- armor platingDefensive metal cladding
gunboat · broadside · steam engine · naval warfare · civil war · union · confederacy · blockade · shipbuilding · drydock
contract
Enforceable written agreement
- guaranteeFormal promise of fulfillment
- commitmentFirm pledge to act
- pledgeBinding promise given
promise · binding · unbreakable · watertight · airtight · inviolable · covenant · oath · vow · warranty
armored
Protected by metal covering
- impregnableImpossible to capture
- reinforcedMade more resistant
- fortressHeavily defended military structure
stronghold · bastion · citadel · bulwark · entrenched · defended · bunker · rampart · barricaded · invulnerable
unwavering
Steady and unchanging
- steadfastFirmly loyal, unshakeable
- unyieldingRefusing to give way
- adamantStubbornly refusing to yield
inflexible · unshakeable · immovable · firm · tenacious · dogged · uncompromising · stubborn · obstinate · intransigent
- Civil War Slangskedaddle, Johnny Reb, bluebelly, grayback, copperhead
- maritimeships, ship, boat, boats, anchors
- watercraftboat, sailboat, kayak, canoe, ships
- ironferrous, ferric, ferrite, hematite, magnetite
- Navieswarships, ships, cruiser, battleship, sailors
- Navyadmiral, battleship, destroyer, aircraft carrier, cruiser
ironcladflexible
Able to bend freely
loose · breakable · negotiable · nonbinding · bendable
ironcladunarmored
Lacking protective covering
unprotected · bare · unsheathed · exposed · vulnerable
- ironclad shipsMetal-hulled military vessels