IPA: /ˈbʊə.ɹɪʃ.li/
KK: /ˈbʊrɪʃli/
In a way that is rude, insensitive, or lacking in social manners.
He spoke boorishly at the dinner party, making everyone uncomfortable.
Boorishly → It is formed from "boor" (from Middle Dutch "boer", meaning farmer or peasant) and the suffix "-ish" (meaning having the quality of). The word "boorishly" describes behavior that is characteristic of a boor, implying rudeness or a lack of refinement.
Think of a 'boor' as someone who behaves like a 'peasant' — and the '-ish' means having that quality. So, when someone acts boorishly, they are acting in a rude or unrefined manner.