IPA: /ʌnˈmætʃəbl/
KK: /ʌnˈmætʃəbl/
Something that cannot be matched or compared to anything else; unique or unparalleled.
Her talent in painting is truly unmatchable, setting her apart from all other artists.
Unmatchable → It is formed from "un-" (meaning not) and "match" (from Old English *macian*, meaning to make or to fit) and "-able" (meaning capable of). The word "unmatchable" means not capable of being matched or compared.
Think of 'not' ('un-') being able to 'fit' or 'make' a comparison ('match') — that's why unmatchable means something that cannot be matched.