'moderate-sized' originates from the combination of 'moderate' and 'sized', where 'moderate' comes from Latin 'moderatus', meaning 'restrained' or 'kept within measure', and 'sized' is derived from the Old French 'sise', meaning 'size'.

'moderate' changed from the Latin word 'moderatus' and eventually became the modern English word 'moderate'. 'Sized' evolved from the Old French 'sise' to the modern English 'size'.

Initially, 'moderate' meant 'restrained' or 'kept within measure', but over time it evolved into its current meaning of 'medium'.