'noncomparability' is formed in English by combining the negative prefix 'non-' (meaning 'not') with the noun 'comparability' (from 'compare'). The verb 'compare' ultimately comes from Latin 'comparare', where 'com-' (or 'com-') meant 'together' and 'parare' meant 'to prepare' or 'make ready/equal'.

The verb 'compare' entered English via Old French 'comparer' from Latin 'comparare'. 'Comparability' developed in English by adding the suffix '-ability' to 'compare' (compare → comparability), and later the prefix 'non-' was attached to form 'noncomparability'.

Originally, Latin 'comparare' meant 'to pair together or make equal'. Over time, English 'comparability' came to mean 'the capacity to be compared', and 'noncomparability' denotes the absence of that capacity—'not able to be compared' or 'not suitable for comparison'.