'interject' originates from Latin, specifically the word 'interjicere,' where 'inter-' meant 'between' and 'jacere' meant 'to throw.'

'interjicere' transformed into the French word 'interjecter,' and eventually became the modern English word 'interject' through Middle English.

Initially, it meant 'to throw between,' but over time it evolved into its current meaning of 'to insert or interrupt with a comment or remark.'