'unwavering' originates from the prefix 'un-' meaning 'not' and the word 'waver,' which comes from Middle English 'waveren,' meaning 'to sway or fluctuate.'

'waveren' transformed into the modern English word 'waver,' and with the addition of the prefix 'un-,' it became 'unwavering.'

Initially, 'waver' meant 'to sway or fluctuate,' but with the prefix 'un-,' it evolved to mean 'not swaying or hesitating.'