'trinity' originates from Latin, specifically the word 'trinitas,' where 'tri-' meant 'three' and '-nitas' meant 'state or condition.'

'trinitas' transformed into the Old French word 'trinité,' and eventually became the modern English word 'trinity' through Middle English.

Initially, it meant 'the state of being three,' but over time it evolved into its current meaning of 'a group of three' or 'the Christian Godhead.'