'unskillfully-done' originates from the prefix 'un-' meaning 'not' and 'skillfully' from 'skill' meaning 'ability or expertise', combined with 'done' from Old English 'don', meaning 'to perform or execute'.

'unskillfully-done' evolved from the combination of 'unskillful' and 'done', reflecting a lack of skill in execution.

Initially, it meant 'not done with skill', and this meaning has remained consistent in modern usage.