The word "legionnaire" refers to a person who is a member of a legion, especially a military force. Its antonyms can include words like pacifist, antagonist, dissident, rebel, and insurgent. A pacifist is a person who advocates for peace and non-violence and is opposed to war, such an individual is different from a legionnaire who is a member of a military force ready for combat. An antagonist is an adversary or an enemy, someone who opposes a protagonist, making them the opposite of a legionnaire, who is part of a team or group. A dissident is someone who openly disagrees with an idea or a policy, another opposite of a legionnaire, who is typically aligned with the viewpoints of their legion. Rebels and insurgents are individuals who rise against the established order.