Infektoituneisiin

Infektoituneisiin is a Finnish word-form that functions as the illative plural of the participle adjective infektoitunut, meaning infected. It translates roughly as to the infected or into the infected and is used to refer to a group of people or objects described as infected when indicating direction toward them or targeting them in a sentence. It is not a stand-alone noun but a grammatical form.

Form and morphology: The form comes from the stem infektoitune- plus the illative plural suffix -isiin. In Finnish, the illative marks movement into or toward something, and its plural form is used when the referent is a group rather than a single entity. The ending -isiin is typical for illative plural of adjectives or participles of this class. The word thus represents a specific grammatical case and number combination rather than a distinct lexical item.

Usage: This form appears mainly in formal or technical Finnish, such as public health, epidemiology, and academic writing. It is commonly used when a sentence requires specifying movement toward or targeting a group defined as infected. Because it is a case ending rather than a standalone lexeme, its function depends on the surrounding verb or preposition and on the broader syntactic structure of the sentence.

Etymology and relation: Infektoituneisiin is derived from infektoitunut (infected) with the illative plural suffix, illustrating how Finnish forms compound meanings through case endings. Related terms include infektoitunut (infected) in singular and other illative forms for different numbers or grammatical roles.

See also: Finnish grammar; Illative case; Infektoitunut; Participles in Finnish.