civil
adj.adj. polite and formal in a way that is just enough to be respectful, even if you do not like the person. It also describes things that relate to ordinary citizens rather than the military or religion.
adj. adhering to the minimum standards of social politeness; also relating to the private rights of citizens and legal proceedings that are not criminal in nature. Often used to distinguish secular or domestic matters from military or ecclesiastical ones.
They managed to have a civil conversation despite their disagreement.
The two neighbors remained civil toward each other for the sake of the children, though they were no longer friends.
While the dispute began as a personal grievance, it eventually escalated into a civil lawsuit concerning property boundaries and historical land rights.
From Middle English cyvyl, civil, borrowed from Old French civil, from Latin cīvīlis (“relating to a citizen”), from cīvis (“citizen”). Cognate with Old English hīwen (“household”), hīrǣden (“family”). More at hind; hird.
When describing behavior, it often implies a cold or forced politeness. In a legal context, it is used to contrast with 'criminal'.