'affined' originates from the Latin word 'affinis,' where 'ad-' meant 'to' and 'finis' meant 'border' or 'end.'

'affinis' transformed into the Old French word 'affiner,' and eventually became the modern English word 'affine' through Middle English.

Initially, it meant 'to bring to an end or border,' but over time it evolved into its current meaning of 'related by marriage or kinship.'