IPA: /ˈsteɪnəbl/
KK: /ˈsteɪnəbl/
Capable of being stained or marked with a color or substance.
The fabric is stainable, so it can easily absorb colors from spills.
Stainable is formed from "stain" (from Old French *esteindre*, meaning to extinguish or to stain) and "-able" (meaning capable of). The word "stainable" refers to something that is capable of being stained.
Think of something that can be 'stained' — 'stain' means to mark or discolor, and '-able' means it can happen. This helps you remember that 'stainable' means something that can be stained.