IPA: /ʌnˈkuːθli/
KK: /ʌnˈkuːθli/
In a way that is rude, awkward, or lacking good manners.
He spoke uncouthly at the dinner party, making everyone uncomfortable.
Uncouthly → It is formed from "un-" (meaning not) and "couth" (from Old English *cūð*, meaning known or familiar) and the suffix "-ly" (meaning in a manner). The word "uncouthly" means in a manner that is not known or familiar, often implying awkwardness or lack of refinement.
Think of 'not known' ('un-') and 'familiar' ('cūð') to remember that 'uncouthly' describes a manner that is awkward or lacking refinement.