'irresolution' originates from Latin, specifically the word 'irresolutio,' where 'in-' meant 'not' and 'resolutio' meant 'loosening or untying.'

'irresolutio' transformed into the French word 'irrésolution,' and eventually became the modern English word 'irresolution' through Middle English.

Initially, it meant 'not loosening or untying,' but over time it evolved into its current meaning of 'indecisiveness or uncertainty.'