'abnormal-shaped' originates from the combination of 'abnormal' and 'shaped'. 'Abnormal' comes from Latin, specifically the word 'abnormis', where 'ab-' meant 'away from' and 'norma' meant 'rule'.

'Abnormis' transformed into the English word 'abnormal', and when combined with 'shaped', it became 'abnormal-shaped'.

Initially, 'abnormal' meant 'away from the rule', but over time it evolved into its current meaning of 'deviating from the normal'.