The antonyms for the word "most plundered" would be "well-preserved," "secured," "protected," "untouched," "guarded," and "safe." These words convey the opposite meaning of the word "plundered," which means to loot, rob, or steal. It indicates that the object or place has been subjected to extensive damage and theft. In contrast, the antonyms imply that the things are secure, in good shape, and have not been subjected to any harm or illegal activities. The use of antonyms can help to create a balanced tone and convey a different aspect of the situation to the readers.