Malnutrition (noun)

1. Lack of proper nutrition due to an insufficient or unbalanced diet.
2. Poor physical condition resulting from lack of proper nutrition.

Origin:

The word "malnutrition" originated in the early 20th century from the combination of the words "mal" (meaning bad) and "nutrition" (meaning the process of providing or obtaining the food necessary for health and growth).

Examples:

1. Many children in developing countries suffer from malnutrition.
2. Malnutrition can cause a variety of health problems.
3. The patient was suffering from severe malnutrition.
4. Malnutrition is a leading cause of death in developing countries.
5. The patient's malnutrition was caused by an inability to digest gluten.