'loutishness' originates from English, specifically formed from the adjective 'loutish' plus the noun-forming suffix '-ness', where '-ness' meant 'state or quality'.

'loutish' changed from the adjective formed by adding '-ish' to the noun 'lout'; 'lout' comes from Middle English 'lowte'/'lout' and earlier vernacular forms and eventually became the modern English word 'lout'.

Initially, the root 'lout' was associated with stooping or a clumsy fellow (Middle English senses like 'to bow or stoop'), but over time it evolved to mean 'a rude, clumsy, or uncouth person'; 'loutishness' therefore came to mean the state of being such a person — rough or boorish behavior.