'slowly-evaluated' originates from the combination of 'slowly,' meaning 'at a slow pace,' and 'evaluated,' meaning 'assessed or analyzed.'

'Slowly' and 'evaluated' have been used in English since the Middle Ages, with 'slowly' deriving from Old English 'slāwlice' and 'evaluated' from Latin 'ēvaluātus.'

Initially, 'slowly' meant 'at a slow pace,' and 'evaluated' meant 'assessed.' The combined term retains these meanings in modern usage.