Haitallisissa

Haitallisissa is the inessive plural form of the Finnish adjective haitallinen, meaning harmful or detrimental. It is used to describe plural nouns in contexts that express “in” or “within” something, such as environments, substances, or effects. Finnish adjectives decline to agree with the nouns they modify, so haitallisissa appears only when the head noun is plural and in the inessive case.

Usage notes:

- Haitallisissa modifies plural nouns in the inessive case, for example in environmental or contextual phrases.

- It is not a standalone noun; it functions as an attributive adjective within a larger noun phrase.

Examples:

- Haitallisissa ympäristöissä työskentely voi altistaa työntekijät terveysriskille. (Working in harmful environments can expose workers to health risks.)

- Haitallisissa aineissa on noudatettava tiukkoja turvallisuustoimenpiteitä. (In harmful substances, strict safety measures must be followed.)

- Tutkimus tarkastelee haitallisten vaikutusten ilmenemistä haitallisissa olosuhteissa. (The study examines the occurrence of adverse effects in harmful conditions.)

Related terms:

- Haitallinen (singular form meaning “harmful”)

- Haittavaikutus (adverse effect)

- Suomen kielen taivutus: haitallisissa follows the standard pattern for adjectives in the inessive plural (root + -ssa/-ssä for singular, -issa/-issä for plural).

Haitallisissa thus serves as a grammatical form used to express “in harmful [plural noun]” in Finnish, reflecting standard agreement rules rather than representing a separate concept.