civil
The German word 'zivil' is an adjective that is used to describe something as being civil, polite, or non-military. It is often used in contrast to 'militärisch' (military). For example, 'zivile Kleidung' means 'civilian clothing', and 'zivile Flugzeuge' means 'civilian aircraft'.
Your behavior is not civil.
This sentence is used to express disapproval of someone's behaviour, stating it's not polite or respectful, what is expected in a civil society.
Civil law regulates relations between individuals.
This sentence is commonly used in the legal context. It refers to the body of laws that govern personal, as opposed to criminal, disputes.
He worked as a civil engineer.
This is a sentence that describes someone's profession - in this case, a civil engineer, who is involved in the design and construction of public works like roads or bridges.