'adyton' originates from Greek, specifically the word 'ἄδυτον', where 'a-' meant 'not' and 'dyein' meant 'to enter'.

'ἄδυτον' transformed into the Latin word 'adyton', and eventually became the modern English word 'adyton'.

Initially, it meant 'a place not to be entered', but over time it evolved into its current meaning of 'a restricted area within a temple'.