haigusena

Haigusena is an Estonian grammatical form meaning “as a disease.” It is the essive case form of the noun haigus (disease) and is used to indicate a temporary state, condition, or role. The essive case is formed by adding the suffix -na to the stem, producing haigusena from haigus. This form is a standard part of Estonian morphology and appears in linguistic descriptions, academic writing, and, occasionally, medical or clinical texts when a circumstance is described in the capacity of a disease.

Usage of haigusena expresses that something is being considered, described, or acted upon in the capacity of a disease rather than in another sense. It is most commonly found in formal or technical registers rather than everyday speech, where simpler phrasing is often preferred. In linguistic discussions, haigusena is cited as a typical example of the essive case, illustrating how Estonian marks temporary states or roles.

Etymology and grammar: haigusena combines haigus (disease) with the essive suffix -na, aligning with other Estonian essive forms used to denote “in the state of” or “as.” The form is part of standard Estonian noun morphology and is taught in resources covering case forms.

See also: Estonian language, Essive case, Haigus, Linguistic morphology.