'muesli' originates from Swiss German, specifically the word 'Müsli,' where 'Mus' meant 'mash' or 'puree.'

'Müsli' transformed into the English word 'muesli' and has been used in English since the early 20th century.

Initially, it referred to a 'mash' or 'puree,' but over time it evolved into its current meaning of a breakfast dish made of oats, nuts, and dried fruits.