'unsuited' originates from the prefix 'un-' meaning 'not' and the word 'suited' from the verb 'suit', which comes from the Old French 'suite', meaning 'attendance' or 'pursuit'.

'suited' changed from the Old French word 'suite' and eventually became the modern English word 'suit'.

Initially, 'suit' meant 'to follow or pursue', but over time it evolved into its current meaning of 'to be appropriate or fitting'.