unsmashable

Immune to breaking

Unsmashable describes something that cannot be smashed or broken through impact.

The word typically appears in marketing for durable products like phone cases or children's toys, or in casual speech to emphasize extreme resilience: They claim the screen is unsmashable, but I'm not testing that theory.

Like many un- + -able formations, it often carries a note of exaggeration or challenge rather than literal indestructibility.

durable

indestructible

Impossible to damage permanently

unbreakableImpossible to damage
shatterproofResistant to breaking
reinforcedMade more resistant

fortified · armored · hardened · tempered · toughened · robust · sturdy · solid · heavy-duty · long-lasting

metaphorical

unshakable

Impossible to disturb

steadfastFirmly loyal, unshakeable
unwaveringSteady and unchanging
resoluteFixed in purpose

unyielding · tenacious · stalwart · rock-solid · determined · invincible · unconquerable · unassailable · undefeatable · unbowed

secure

protected

Kept from harm

safeguardedKept from harm
tamper-proofResistant to unauthorized modification
lockedFastened with a mechanism

encrypted · guarded · sealed · vault-like · impenetrable · fireproof · burglarproof · childproof · fail-safe · foolproof

resilient

flexible

Able to bend freely

bendableAble to curve
springyAble to rebound
elasticAble to stretch, rebounds

pliable · supple · adaptable · recoverable · buoyant · malleable · ductile · yielding · rebounding · impact-resistant

Opposites

physical durability/breakability

unsmashablesmashable

Capable of being shattered

breakable · shatterable · fragile · brittle · frangible

Family

smash, smashed, smasher, smashers, smashing, smashable

Familiarity: Top 1,000,000
Profile: Known to kids · Used worldwide · Timeless · Everyday, not technical · Rated G