The antonyms for the word "more soft-shelled" are "hard-shelled," "crusty," "firm," and "stiff." The term "soft-shelled" usually indicates something that is fragile, delicate, or weak. Therefore, its antonyms suggest the opposite characteristics. For instance, a hard-shelled animal or fruit is robust and tough, while a crusty or stiff substance is strong and resistant. These antonyms are useful when describing things related to food, organisms, and objects. They can help to emphasize the texture, strength, and durability of a particular item, providing readers with a more precise and accurate picture of it.