The phrase "most gnawed" refers to something that has been heavily chewed or bitten. Some synonyms for "most gnawed" include "heavily chewed," "worn down," "frayed," "mangled," "devoured," and "consumed." These words all convey the idea that an object has been used extensively or damaged by biting or chewing. The term "most gnawed" can also be replaced with phrases such as "well-worn," "well-used," and "well-loved," which suggest that an object has been well-used and appreciated over time. Ultimately, the choice of synonym depends on the context and tone of the writing, as well as the specific object being described.