'suddenly-formed' originates from the combination of 'suddenly' and 'formed', where 'suddenly' comes from Middle English 'sodein', meaning 'unexpected', and 'formed' from Old English 'formian', meaning 'to shape'.

'suddenly' changed from the Middle English word 'sodein' and 'formed' from Old English 'formian', eventually combining to form the modern English term 'suddenly-formed'.

Initially, 'suddenly' meant 'unexpectedly', and 'formed' meant 'to shape', but together they evolved to mean 'created in a short time'.