haitallisista

Haitallisista is a Finnish adjective form meaning “from harmful” or “of harmful” and is used with plural nouns. It is the elative plural form of haitallinen, the basic adjective meaning harmful or detrimental. In contexts where the noun it modifies is in the elative case or the speaker wishes to express origin or source, haitallisista appears, for example in phrases describing effects or substances that come from harm.

In practical use, haitallisista is common in scientific, health, environmental, and regulatory writing. It characterizes things that can cause damage or adverse outcomes, such as substances, effects, or processes. The corresponding nominative plural form haitalliset is used to say “the harmful [things]” without indicating origin. The elative form haitallisista thus shifts the focus to the source or basis of harm.

Grammatically, haitallisista is formed from the stem haitallinen plus the suffix -ista, which signals the elative plural when paired with a suitable plural noun. The root haitallinen itself derives from haitta, meaning harm or nuisance, with the typical Finnish adjective suffix -llinen.

See also: haitta, haitallinen, haittavaikutus, haitallinen aine. These related terms cover the concept of harm in Finnish, including nouns for harm and harmful effects, and the broader category of harmful substances or conditions that haitallisista may describe in context. Overall, haitallisista functions as a precise, formal descriptor used to discuss harmful origins or sources in Finnish discourse.