'instinctuality' originates from Latin, specifically the Late Latin word 'instinctus' (meaning 'a being urged on' or 'impulse'), combined with the adjectival suffix '-al' and the noun-forming suffix '-ity'.

'instinctuality' developed from Latin 'instinctus' → Old French/Medieval Latin forms of 'instinct' → Middle English 'instinct' + the suffixes '-al' and '-ity' to form the modern abstract noun 'instinctuality'.

Initially it referred to an inward stirring or impulse ('instinctus'); over time, with the addition of '-al' and '-ity', it evolved into the modern abstract sense 'the quality of being guided by instinct'.