IPA: /ˈsɪŋkəbl/
KK: /ˈsɪŋkəbl/
Able to be submerged in water or to go down below the surface.
The ship was designed to be sinkable in case of an emergency.
Sinkable → It is formed from "sink" (from Old English "sincan", meaning to go down or descend) and "-able" (meaning capable of). The word "sinkable" means capable of being sunk or able to go down.
Think of something that is 'capable of going down' — 'sink' means to descend, and '-able' indicates the ability to do so.