päätöksellä

Päätöksellä is the adessive singular form of the Finnish noun päätös, meaning a decision. In Finnish, the form is used to express means, basis, or authority for an action, especially in formal, administrative, and legal language. It can indicate that something is done by virtue of a decision or through a decision, rather than through personal discretion or direct order.

In practice, päätöksellä often appears with an agent in the genitive, such as hallituksen päätöksellä (by the board’s decision) or kunnan päätöksellä (by the municipality’s decision). It may also convey that an act is carried out on the basis of a specific decision. The phrase is common in official texts, regulatory documents, and organizational communications where decisions shape subsequent actions.

Päätöksellä is distinct from the expression päätöksen mukaan, which means according to the content or instructions of the decision. While päätöksen mukaan links actions to the decision’s provisions, päätöksellä emphasizes the authority or instrument that brings about the action.

Etymologically, päätöksellä is formed from päätös (decision) with the instrumental/adessive suffix -llä, following standard Finnish inflection. The usage helps clarify that an outcome is grounded in or executed by a formal decision rather than by informal agreement.

See also: päätös, hallinto, oikeus.