i Register
In some senses, fragility is marked as obsolete. Watch for register when choosing this word.
noun
The condition or quality of being fragile; brittleness; frangibility.
It is tempting to speculate about the incentives or compulsions that might explain why anyone would take to the skies in [the] basket [of a balloon]: […]; perhaps to moralise on the oneness or fragility of the planet, or to see humanity for the small and circumscribed thing that it is; […].
Weakness; feebleness.
Liability to error and sin; frailty.