'unrelatable' originates from the prefix 'un-' meaning 'not' and the word 'relatable', which comes from the Latin 'relatus', the past participle of 'referre', meaning 'to bring back'.

'relatus' transformed into the Old French word 'relater', and eventually became the modern English word 'relate'. The prefix 'un-' was added to form 'unrelatable'.

Initially, 'relate' meant 'to bring back or report', but over time it evolved into its current meaning of 'to connect or establish a relationship'. 'Unrelatable' thus means 'not able to connect'.