'interestingly' originates from the word 'interest,' which comes from the Latin word 'interesse,' where 'inter-' meant 'between' and 'esse' meant 'to be.'

'interest' changed from the Old French word 'interest' and eventually became the modern English word 'interest.'

Initially, it meant 'to be of importance or concern,' and over time it evolved into its current meaning of 'to arouse curiosity or hold attention.'