'unexpectedly-assessed' originates from the combination of 'unexpectedly' and 'assessed'. 'Unexpectedly' comes from 'unexpected', which is derived from the Latin 'ex-' meaning 'out of' and 'spectare' meaning 'to look'. 'Assessed' comes from the Latin 'assidere', meaning 'to sit beside' or 'to assist'.

'unexpectedly-assessed' combines the adverb 'unexpectedly' with the past participle 'assessed', forming a compound adjective.

Initially, 'assessed' meant 'to sit beside' in a supportive role, but over time it evolved into its current meaning of 'evaluating or judging'.