haitallisten

Haitallisten is a Finnish grammatical form, specifically the genitive plural of the adjective haitallinen, meaning harmful or adverse. In Finnish, adjectives agree with the nouns they modify, and the genitive plural haitallisten is used to indicate “of the harmful” or to form noun phrases that refer to groups or qualities associated with harm. The corresponding plural nominative haitalliset can function as a substantive meaning “the harmful ones.”

Origins and meaning: haitallinen comes from haitta, meaning harm, damage, or disadvantage. Through standard Finnish inflection, haitallinen can take various endings to agree with different cases and numbers. Haitallisten appears when the head noun is in the genitive plural, as in phrases describing substances, effects, or actors associated with harm.

Typical usage: haitallisten appears most often within compound noun phrases such as haitallisten aineiden määrä (the amount of harmful substances) or haitallisten vaikutusten ehkäisy (prevention of harmful effects). It can also occur in longer expressions like haitallisten toimien ehkäisymahdollisuudet (possibilities to prevent harmful actions). In some registers, haitalliset (the harmful ones) is used as a plural noun phrase, whereas haitallisten emphasizes possessive or relational meaning within a sentence.

Context and style: the form is common in academic, regulatory, and formal public discourse relating to health, environment, and safety. To avoid ambiguity, writers typically pair haitallisten with a clear head noun, such as aineiden or vaikutusten, so the reference remains explicit.

See also: haitallinen, haitta.