IPA: /ˈsɪvəli/
KK: /ˈsɪvəli/
In a way that is polite and respectful, especially in social situations.
They discussed their differences civilly, without raising their voices.
Civilly → It is formed from "civilis" (from Latin, meaning relating to citizens or society) and the adverbial suffix "-ly" (meaning in a manner of). The word "civilly" means in a manner relating to citizens or society, often implying politeness or adherence to social norms.
Think of 'civil' as relating to citizens and society, and remember that 'civilly' means behaving in a way that reflects those social norms.