nonsinkable

adjective non·sink·able \ ˌnän-ˈsiŋ-kə-bəl \

Definition of nonsinkable

: incapable of being sunk : unsinkable
  • … whale boats molded of glass and teflon and made nonsinkable by plastic foam in all dead spaces.
  • —Robert A. Heinlein
  • nonsinkable vessels

First Known Use of nonsinkable

1875

in the meaning defined above

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