'trust' originates from Old Norse, specifically the word 'traust', where 'traust' meant 'confidence, protection'.

'traust' transformed into the Middle English word 'trust', and eventually became the modern English word 'trust'.

Initially, it meant 'confidence or protection', but over time it evolved into its current meaning of 'reliance on the integrity, strength, ability, surety, etc., of a person or thing'.