'indignant' originates from Latin, specifically the word 'indignari,' where 'in-' meant 'not' and 'dignus' meant 'worthy.'

'indignari' transformed into the French word 'indignant,' and eventually became the modern English word 'indignant' through Middle English.

Initially, it meant 'unworthy or undeserving,' but over time it evolved into its current meaning of 'feeling or showing anger at unfair treatment.'