IPA: /ˌɪn.kəˈmɛn.sjʊ.rə.bəl/
KK: /ɪnˌkəˈmɛnʃərəbəl/
Something that cannot be measured or compared because it lacks a common quality or standard.
The two cultures had incommensurable values that made understanding each other difficult.
A person or thing that cannot be measured or compared with others due to a lack of a common standard.
The two cultures had incommensurables that made it difficult to find common ground.
Incommensurable → It is formed from "in-" (meaning not), "com-" (meaning together), "mensura" (meaning measure), and "-ble" (meaning capable of). The word describes something that cannot be measured together or compared in a meaningful way.
Think of something that is 'not' ('in-') 'capable of being measured together' ('mensura' and '-ble') — that's why incommensurable means it cannot be compared.