resilience |rəˈzilyəns| (also resiliency)
1 the capacity to recover quickly from difficulties; toughness: the often remarkable resilience of so many British institutions.
2 the ability of a substance or object to spring back into shape; elasticity: nylon is excellent in wearability and resilience.
What makes you more resilient that growing up in abandoned buildings, not once, not twice, but three times; with rats, roaches, no food, no heat, no clothes? Nothing but each other and love. Wonder why those are “the good ole days”?