'boorish' originates from the Dutch word 'boer,' meaning 'farmer' or 'peasant,' which was used to describe someone with unsophisticated manners.

'boer' transformed into the English word 'boor,' and eventually became the adjective 'boorish' to describe rude behavior.

Initially, it referred to someone of peasant origin, but over time it evolved to describe rude or insensitive behavior.