Antifragility
Antifragility is a mental model describing systems that actually benefit from shocks, volatility, and uncertainty, rather than merely withstanding them.
Antifragility, a concept introduced by Nassim Nicholas Taleb, goes beyond resilience or robustness. The antifragile becomes stronger when subjected to stress, disorder, or volatility. For example, the human body is antifragile. If you lift weights, you're creating stress and damage to your muscles. However, as your body repairs, it also adapts to handle a higher level of stress in the future, making you stronger.
Some things benefit from shocks; they thrive and grow when exposed to volatility, randomness, disorder, and stressors and love adventure, risk, and uncertainty. Yet, in spite of the ubiquity of the phenomenon, there is no word for the exact opposite of fragile. Let us call it antifragile - Nassim Nicholas Taleb