Search Result for "unsinkable": 
Wordnet 3.0

ADJECTIVE (1)

1. incapable of being sunk;
- Example: "they thought the Titanic was unsinkable"



WordNet (r) 3.0 (2006):

unsinkable
    adj 1: incapable of being sunk; "they thought the Titanic was
           unsinkable" [ant: sinkable]