sisällöillä

Sisällöillä is the plural adessive form of the Finnish noun sisältö, meaning contents or content. The adessive case marks location or association, so sisällöillä translates roughly as “with the contents” or “on the contents.” This form is used when referring to the contents that something contains, or to the contents as a feature or component of a larger object, often in descriptive or formal contexts.

In practice, sisällöillä is most commonly found in discussions about physical containers, documents, collections, or other items that have multiple components. For example, a phrase might refer to “laatikon sisällöillä” to denote what is in or included in the box, or to describe the contents of several items within a collection. The form can also appear in more abstract or institutional language when discussing the subject matter or substantive elements of a document, report, or archive.

Morphology and related forms: sisältö is the base form (singular); other forms include sisältöä (partitive), sisällön (genitive), sisällöt (plural nominative), sisällöistä (plural elative), and yksikön adessiv sisällöllä. The plural adessive form sisällöillä specifically conveys “with the contents” of multiple items or aspects.

See also: Finnish grammar, case systems, and the noun sisältö and its various inflected forms. Depending on context, alternative expressions such as sisältö (singular) or sisällöt (plural nominative) may be preferred to avoid ambiguity.