IPA: /ˈfoʊməbl/
KK: /ˈfoʊməbəl/
Able to be turned into foam or to produce foam.
The new soap is foamable, making it easy to create lather when washing hands.
Foamable → It is formed from "foam" (from Old English *fām*, meaning a mass of bubbles) and "-able" (meaning capable of). The word "foamable" means capable of being foamed or able to produce foam.
Think of something that can create a mass of bubbles — that's what foamable means, as it describes something capable of being foamed.