Definition of unsinkability in US English:

unsinkability

noun

  • See unsinkable

    • ‘Aiming at unsinkability, ships have watertight doors and bulkheads.’
    • ‘The outer skin is backed by urethane foam - adding to its ‘unsinkability.’’
    • ‘Its remarkable buoyancy, and the Whaler's legendary unsinkability, was simply a coincidence.’
    • ‘The Titanic is remembered for something else - its hubris, its unsinkability.’
    • ‘The modern trimaran with its enormous stability and unsinkability is a very safe craft, and has now established an excellent safety record.’

Pronunciation

unsinkability

/-ˌsiNGkəˈbilətē/