The term "rigidified" refers to something that has become stiff or inflexible. The opposite of rigidified would be something that is flexible, pliable, or malleable. These antonyms denote a sense of adaptability, resilience and fluidity, which is the opposite of being fixed or invariable. Words such as supple, bendable, elastic, adaptable, and pliant signify the opposite of rigidity, as they denote an ability to change, adjust, or stretch according to the needs or demands of the situation at hand. These antonyms are useful when describing materials, structures, or attitudes that are open to change and are not constrained by set or rigid patterns.