illness

noun

IL-nuhs/ˈɪl.nəs/

Pluralillnesses (some meanings)

2 meanings of illness

1
noununcountable
Being sick or in poor health for a time.
She missed weeks of school because of illness.
Long-term illness made it hard for him to keep his job.
Similarsickness, disease, infirmity
Oppositehealth, wellness
2
nouncountable
A sickness or disease that a person has.
He recovered quickly from a short illness.
Childhood illnesses like measles are much rarer now.
Similardisease, sickness, ailment, condition, disorder

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Origin

This word comes from "ill" plus the ending "-ness".