The word "armour-plated" implies a level of protection or strength, but there are plenty of antonyms that suggest the opposite. Some examples include vulnerable, exposed, defenseless, fragile, weak, and unprotected. These words evoke a sense of danger or insecurity rather than the protection implied by "armour-plated." Other antonyms include soft, flimsy, and delicate, which suggest a lack of toughness or durability. When looking for alternatives to "armour-plated," consider words that contrast with its connotations of strength, durability, and protection.