Haitallisiin

Haitallisiin is a Finnish grammatical form derived from the adjective haitallinen, meaning harmful. It is the illative plural form used to indicate movement into or toward harmful things, and it typically appears with a plural noun or with a plural adjective acting as a noun. In practice, haitallisiin functions to specify “into the harmful ones” or “into harmful things” in a sentence.

Etymology and morphology: haitallinen (harmful) takes the plural form haitalliset when used as a noun or adjective describing a plural subject. The illative plural suffix -iin attaches to the plural form to yield haitallisiin, signaling direction toward or into that category in contexts such as safety, health, or risk discussions. The form is thus a case-inflected expression rather than a standalone lexical item.

Usage: Haitallisiin appears mainly in technical, scientific, or policy language where the speaker is describing actions, substances, effects, or influences that are harmful. Examples include phrases like haitallisiin aineisiin (into harmful substances), haitallisiin vaikutuksiin (into harmful effects), or haitallisiin tekoihin (into harmful actions). The meaning depends on the preceding noun; without a governing noun, haitallisiin is not used alone.

See also: haitallinen, haitalliset, illatiivi (illative) case, Finnish grammar, risk communication.

Translation: In English, haitallisiin is context-dependent and generally translated as “into the harmful ones” or “into harmful things.” It is best understood as a grammatical form rather than a standalone concept.