'unloggable' originates from the prefix 'un-' meaning 'not' and the word 'loggable', which comes from 'log', meaning to record or write down.

'Loggable' evolved from the verb 'log', which was used in the context of recording information, and the prefix 'un-' was added to denote the opposite.

Initially, 'loggable' meant 'capable of being recorded', and with the prefix 'un-', it evolved to mean 'not capable of being recorded'.