'saunterer' originates from the verb 'saunter', which is believed to have come from Middle English 'santren', meaning 'to muse'.

'santren' transformed into the modern English word 'saunter', and 'saunterer' was derived from it to describe someone who saunters.

Initially, it meant 'to muse or reflect while walking', but over time it evolved into its current meaning of 'walking leisurely'.