Unsinkable
(adjective)
Not able to sink; buoyant; able to float.
Origin:
Formed from the prefix un- meaning not, and sinkable meaning capable of sinking.
Examples:
- The Titanic was thought to be unsinkable but it met its tragic end.
- The life rafts are unsinkable and can support many people.
- The unsinkable material can be used to make boats and ships more buoyant.
- The unsinkable buoyancy of the ships help to prevent sinking.
- The unsinkable buoyancy aid is designed to keep the wearer afloat in water.