'uncertainly-formed' originates from the combination of 'uncertainly' and 'formed', where 'uncertainly' is derived from 'uncertain', meaning 'not sure or definite', and 'formed' from 'form', meaning 'to shape or create'.

'Uncertainly' evolved from the Middle English 'uncertain', and 'formed' from the Old French 'former', eventually becoming the modern English 'uncertainly-formed'.

Initially, it meant 'not clearly shaped', and this meaning has largely remained the same in modern usage.