'unforeseenly-led' originates from the combination of 'unforeseen' and 'led', where 'unforeseen' means 'not anticipated' and 'led' is the past participle of 'lead'.

'unforeseen' changed from the Old English word 'unforseon' and 'led' from the Old English 'lædan', eventually forming the modern English compound 'unforeseenly-led'.

Initially, 'unforeseen' meant 'not seen or predicted', and 'led' meant 'guided'. Together, they evolved to mean 'unexpectedly guided'.