Somewhere along the line, Indy's Bioengineered thick hide Translated into meaning indestructible. That's quite understandable being that her Species name is indominus Rex which I guess is a play on indomitable Which is defined as being impossible to subdue or defeat
What is she really that impossible to defeat? Everyone thought that the only way to kill this dinosaur wasn't around her because somehow her hi was so indestructible but not even a rock it could blow her up which is completely untrue.

Examples of how much power was needed for the I-rex: