'supernaturalistic' originates from English, formed by combining 'supernatural' + the adjective-forming suffix '-istic'. 'supernatural' itself comes from Latin elements 'super-' meaning 'above' and 'natura' meaning 'nature'.

'supernaturalistic' developed in modern English by adding the suffix '-istic' (from Greek '-istikos' via Latin/French usage) to the adjective 'supernatural', which in Middle English came from Late Latin 'supernātūrālis' and Latin 'supernāre'/ 'natura'.

Initially the components meant 'above nature' (Latin sense); over time the combined modern term came to mean 'relating to beliefs or interpretations that invoke the supernatural', a narrower descriptive adjective used in literary, philosophical, or theological contexts.