'genuine' originates from Latin, specifically the word 'genuinus,' where 'genu-' meant 'knee,' referring to the custom of acknowledging a child by placing them on the knee.

'genuinus' transformed into the English word 'genuine,' and eventually became the modern English word 'genuineness' through Middle English.

Initially, it meant 'natural or innate,' but over time it evolved into its current meaning of 'authentic or real.'