haitalliselle

Haitalliselle is a Finnish word-form that functions as the allative singular of the adjective haitallinen, which means "harmful." In Finnish, adjectives are declined to agree with the noun they modify in number and case, and haitallinen becomes haitalliselle when used with a noun in the allative case, which marks direction toward or toward a recipient.

The form haitalliselle is used to indicate something that impinges on or affects a target in a harmful way. It commonly appears in formal or descriptive texts dealing with risks, impacts, or regulatory considerations. Typical phrases include haitalliselle ympäristölle (to a harmful environment) and haitalliselle vaikutukselle (to a harmful effect), among others, where the allative signals the entity that experiences harm or where harm is directed.

Haitalliselle is not a standalone lexical item with a separate meaning; it is a grammatical variant of haitallinen used within phrases to specify the target of harm. The base form haitallinen serves as the dictionary entry meaning "harmful," and haitalliselle represents one of its inflected forms in context.

See also: haitallinen, Finnish grammar, allative case.