'remount' originates from the prefix 're-' (from Latin 're-') meaning 'again' combined with 'mount', which comes from Old French 'monter' (from Latin 'montare'), where the root meant 'to climb' or 'to mount'.

'remount' was formed in Middle English from the prefix 're-' + Old French 'monter'; older Middle English forms include 'remounten' or similar compounds, which eventually became the modern English 'remount'.

Initially it meant 'to mount again' (especially a horse); over time the use broadened to include 'to provide replacement mounts' and 'to set up again' (e.g., displays or fittings), but the core idea of 'again' + 'mount' has been retained.