'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 'holding through or connected,' but over time it evolved into its current meaning of 'relevant or applicable.'