Inadequacy (noun)

1. A lack or shortage of something needed or required.
2. The state of being insufficient or insufficiently supplied.
3. The state of being insufficient to meet a need or requirement.

Origin:

Derived from the latin word 'inadequatus' meaning 'not suitable' or 'deficient'.

Examples:

1. The inadequacy of resources was the main reason for the project's failure.
2. The inadequacy of funding forced the school to cut many programs and services.
3. The inadequacy of personnel led to long wait times for patients in the emergency room.
4. The inadequacy of food supplies was causing widespread hunger in the region.
5. The inadequacy of the current infrastructure is a major obstacle to economic growth in the area.