unsinkable
/ʌnˈsɪŋkəbəl/
adjective
- Unable to sink; designed or made so that it cannot go under water.
- They claimed the new ship was unsinkable, but it hit an iceberg.
- The lifeboat was made of unsinkable materials.
- Modern kayaks are often unsinkable because of built-in flotation chambers.
- Figuratively, impossible to defeat, destroy, or discourage; very resilient.
- Her unsinkable optimism kept the team going through the crisis.
- He has an unsinkable spirit that never gives up.
- The company seemed unsinkable, surviving every economic downturn.
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