When someone is described as "unargumentative," it means they are not inclined to engage in debates or discussions that may lead to disagreements. Some other words that can be used to describe someone who is unargumentative include peaceful, agreeable, cooperative, amiable, conciliatory, accommodating, and non-confrontational. These traits are often valued in personal and professional relationships as they allow for smoother interactions and can help to avoid conflicts. Being unargumentative does not necessarily mean that one is passive or lacks confidence in their opinions, but rather that they choose to approach situations in a calm and measured way.