'transgressor' originates from Latin, specifically the word 'transgressor', where 'trans-' meant 'across' and 'gradi' meant 'to step'.

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

Initially, it meant 'one who steps across boundaries', but over time it evolved into its current meaning of 'one who violates laws or rules'.