Haigusel

Haigusel is the Estonian adessive singular form of the noun haigus, meaning disease. It is used to express location, topic, or association with a disease in a sentence, and often appears when discussing the effects or characteristics of a disease.

In Estonian noun declension, haigus follows the typical pattern of a first-declension noun. The base forms include: nominative haigus, genitive haiguse, partitive haigust, inessive haiguses, elative haigusest, allative haigusele, adessive haigusel, ablative haiguselt, and their plural equivalents (haigused, haiguste, haiguseid, haigustes, haigusest, haigusele, haigusel, haiguselt, haigustel, haigustel, haigustelt, etc.). Haigusel specifically is the adessive singular form used for topical or locative meaning such as “on the disease” or “in regard to the disease.”

Usage and examples. Haigusel is common in medical and academic writing to discuss how a disease relates to health, treatment, or biology. For example:

- Haigusel on suur mõju tervisele. (The disease has a large effect on health.)

- Haigusel on mitu eri staadiumi. (The disease has several stages.)

In broader contexts, haigusel helps link statements to the concept of disease, as in discussions of prognosis, symptoms, or public health.

See also: Estonian grammar, noun declension, health terminology.