The phrase "more softshelled" implies a degree of softness, but what if we want to convey the opposite? There are several antonyms that can be used to describe something with a hard, rigid or tough exterior. Some of these antonyms include 'hard-shelled,' 'firm,' 'rock-solid,' 'unyielding,' 'rigid,' and 'impenetrable.' These words can be used to describe objects that are resistant to pressure, bending or cracking. In contrast to 'more softshelled,' these antonyms convey a sense of toughness and hardness that can be useful when describing shells, armor, or other physical materials. By using antonyms, we open up new ways to describe the world around us, and can better capture the nuances of objects and experiences.