'dully-formed' originates from the English word 'dull,' which comes from Old English 'dol,' meaning 'stupid' or 'foolish,' and 'formed,' from Latin 'formare,' meaning 'to shape.'

'Dull' changed from Old English 'dol' to Middle English 'dul,' and eventually became the modern English word 'dull.' 'Formed' has remained relatively unchanged from its Latin origins.

Initially, 'dull' meant 'stupid' or 'foolish,' but over time it evolved to mean 'lacking sharpness or brightness.'