'non-allocability' originates from the prefix 'non-' meaning 'not' and the word 'allocability', which comes from the Latin 'allocare', meaning 'to assign'.

'allocare' transformed into the English word 'allocate', and eventually became 'allocability' with the addition of the suffix '-ability'. The prefix 'non-' was added to form 'non-allocability'.

Initially, 'allocare' meant 'to assign', and 'allocability' referred to the ability to assign. 'Non-allocability' evolved to mean the inability to assign.