'arranger' originates from French, specifically the word 'arranger', where the prefix 'a-' (from Latin 'ad-') meant 'to' and 'ranger' meant 'to set in a row, arrange'.

'arranger' changed from Old French forms such as 'arengier'/'rangier' and entered Middle English via Anglo-Norman, eventually becoming the modern English word 'arranger'.

Initially, the root meant 'to put in a row; to order', and over time it evolved into the agent noun meaning 'one who arranges' (including musical and organizational senses).