'badly-done' originates from the combination of 'badly' and 'done', where 'badly' is an adverb meaning 'in a bad manner' and 'done' is the past participle of 'do', meaning 'completed or finished'.

'badly' and 'done' have been used in English since the Middle Ages, with 'badly' evolving from Old English 'bædlice' and 'done' from Old English 'dōn'.

Initially, 'badly' meant 'in a bad manner', and 'done' meant 'completed'. Together, they have consistently meant 'performed poorly'.