IPA: /ʌnˈsɪvəli/
KK: /ʌnˈsɪvəli/
In a way that is rude or disrespectful, lacking politeness or courtesy.
He spoke uncivilly to his colleagues during the meeting.
Uncivilly → It is formed from "un-" (meaning not) and "civil" (from Latin "civilis", meaning relating to citizens or society) and "-ly" (meaning in a manner). The word "uncivilly" means in a manner that is not polite or respectful, contrary to the behavior expected in society.
Think of 'not' being added to 'civil' — so when someone acts 'uncivilly', they are behaving in a way that is not polite or respectful.