'pertinent' originates from Latin, specifically the word 'pertinens,' where 'per-' meant 'through' and 'tenere' meant 'to hold.'

'pertinens' transformed into the Old French word 'pertinent,' and eventually became the modern English word 'pertinent' through Middle English.

Initially, it meant 'to hold through or to be connected,' but over time it evolved into its current meaning of 'relevant or applicable.'