'unexpectedly-formed' originates from the combination of 'unexpectedly' and 'formed'. 'Unexpectedly' comes from 'unexpected', which is derived from the Latin 'ex-' meaning 'out of' and 'pectare' meaning 'to look'. 'Formed' comes from the Latin 'formare', meaning 'to shape'.

'Unexpectedly' evolved from the Old French 'despecter', which transformed into the Middle English 'expecten', eventually becoming 'expect'. 'Formed' remained relatively unchanged from its Latin roots.

Initially, 'unexpectedly' meant 'not looked for', and 'formed' meant 'shaped'. Over time, 'unexpectedly-formed' came to mean 'created in an unforeseen manner'.