'aetiologue' originates from Greek, specifically the word 'aitiologia,' where 'aitia' meant 'cause' and 'logos' meant 'study or discourse.'

'aitiologia' transformed into the Latin word 'aetiologia,' and eventually became the modern English word 'aetiologue.'

Initially, it meant 'the study of causes,' and this meaning has largely remained the same in modern usage.