Which term reflects a peaceful state without agitation?

The term "placid" specifically describes a state of tranquility or calmness, free from disturbance and agitation. It evokes an image of a serene environment or a peaceful demeanor, making it the ideal choice for conveying a lack of turmoil or unrest. In contrast, "placating" refers to actions taken to soothe or appease someone, which does not necessarily imply a state of peace itself. "Raucous" characterizes a loud and harsh sound, often associated with chaos or boisterousness, directly opposing the idea of a peaceful state. "Indolent" generally means lazy or inactive, which, while it may suggest a lack of agitation, does not inherently convey tranquility or peace. Therefore, "placid" is the most accurate term for reflecting a peaceful state without agitation.