'inexaminability' originates from Modern English formation combining the negative prefix 'in-' (from Latin 'in-') with 'examinability' (built from 'examine' + suffix '-ability'), where 'in-' meant 'not' and '-ability' signified 'the quality of being able to be'.

'inexaminability' was formed in Modern English by prefixing 'in-' to 'examinability'. 'Examinability' itself derives from the verb 'examine', which comes from Latin 'examinare' (from 'examen', 'a weighing, test'); the suffix '-ability' comes from Latin '-abilitas' via Old French, producing the English noun-forming '-ability'.

Initially, Latin 'examen' referred to 'a weighing or balancing (as a test)'; over time this sense developed into 'to test, inspect, or examine'. The modern compound 'inexaminability' has the specific negated meaning 'not able to be examined', reflecting a straightforward combination of negative prefix and the noun-forming suffix.