breakproof
Cannot be broken
Breakproof describes something designed or claimed to resist breaking: breakproof dishes, breakproof glass.
Like similar formations (shatterproof, foolproof), the -proof suffix promises immunity rather than mere resistance, though in practice breakproof items can still break under enough force.
Marketing often uses the term optimistically.
Resistant to breaking
- sturdySolidly built, durable
- robustStrong and durable
- toughDurable and strong
- hard-wearingResistant to damage
heavy-duty · solid · reinforced · strong · rugged · long-lasting · reliable · dependable
Difficult to interfere with
- encryptedTransformed into cipher
- protectedKept from harm
- lockedFastened with a mechanism
- sealedClosed to prevent entry
safeguarded · fortified · fail-safe · foolproof · childproof · tamper-evident
shatterproof
Resistant to breaking
hard-wearing · heavy-duty · solid · reinforced · strong · rugged · long-lasting · reliable · dependable · tempered
tamper-resistant
Difficult to interfere with
sealed · safeguarded · fortified · fail-safe · foolproof · childproof · tamper-evident
flexible
Able to bend freely
bouncy · springy · cushioned · yielding · give · rebound · recovery · malleable · ductile · supple