Frailty (noun)

1. The quality of being weak or delicate, especially due to age.
2. The quality of being susceptible to physical or emotional harm.
3. The quality of being prone to failure or breaking down.

Origin:

Middle english: from old french frailete, from latin fragilitas "brittleness", from fragilis "brittle".

Examples:

1. The frailty of the elderly patient was a concern for the doctors.
2. The frailty of the dam in the face of the heavy rainfall was a source of worry.
3. The frailty of the negotiation process made it important to proceed with caution.
4. The frailty of the economy was evident in the rising unemployment numbers.
5. The frailty of the witness on the stand was obvious, as she struggled to hold back tears.