uncivilly
Uncivilly is an adverb formed from the adjective uncivil, used to describe the manner in which an action is performed as lacking civility or courtesy. It refers to behavior that violates generally accepted norms of politeness in speech or conduct, rather than the action itself being unlawful. For example, one might say that someone spoke to another uncivilly.
Usage notes frequently indicate that uncivilly is less common in everyday English than synonyms such as rudely
Etymology-wise, uncivilly is built from the prefix un- attached to civil, with the suffix -ly forming an
See also: civility, incivility, rude, etiquette, social norms.