illness
n. C / Un. a condition where your body or mind is not healthy, such as having the flu or a cold.
n. a state of poor health or a specific condition that affects the body or mind.
She missed two days of work because of a sudden illness.
The doctor asked several questions to determine if the patient's illness was caused by a virus or bacteria.
Chronic illness often requires a multifaceted approach to management, balancing medical intervention with lifestyle adjustments to maintain a reasonable quality of life.
From ill + -ness.
Uncountable when referring to the general state of being unwell; countable when referring to specific types of diseases or medical conditions.
He has a long illnessHe has a long-term illnessWhen describing the duration of a condition, 'long-term' or 'chronic' is preferred over the bare adjective 'long'.