'unfocus' originates from the prefix 'un-' meaning 'not' or 'reverse' and the word 'focus' from Latin 'focus' meaning 'hearth' or 'center'.

'focus' transformed from the Latin word 'focus' and eventually became the modern English word 'focus'. The prefix 'un-' was added to form 'unfocus'.

Initially, 'focus' meant 'hearth' or 'center', but over time it evolved into its current meaning of 'clarity or center of attention'. 'Unfocus' reverses this meaning.