Which of the following word is an antonym of the word Military?

Civil

The antonym of the word military is civil.

• Military means relating to or characteristic of soldiers or armed forces.
• Civil means relating to ordinary citizens or to civilian life, not military or naval.

The other words do not have opposite meanings to military.

• Public means involving or concerning the people as a whole.
• Coup means a sudden, violent, and illegal seizure of power from a government.
• Civility means politeness and courtesy in behavior or speech.