'ordinariness' originates from the Latin word 'ordinarius,' where 'ordin-' meant 'order' or 'rank.'

'ordinarius' transformed into the Old French word 'ordinaire,' and eventually became the modern English word 'ordinary,' from which 'ordinariness' is derived.

Initially, it meant 'belonging to a regular order,' but over time it evolved into its current meaning of 'commonplace or usual.'