rakkoon

Rakkoon is the illative singular form of the Finnish noun rako, which means a gap, crack, opening, or hollow. The illative case marks direction toward the interior of that opening, so rakkoon translates roughly as into a gap or into a crevice. It is used with verbs of motion or entry to describe something moving into or entering a physical opening.

The noun rako is a basic Finnish word referring to an opening in a surface or boundary. The illative form rakkoon is formed with the illative suffix used to indicate movement into a space. In everyday Finnish, rakkoon is commonly encountered in contexts describing something entering or being directed into a gap or hollow, such as a tool slipping into a crack or an object dropping into a crevice.

Usage notes and nuance: rakkoon is a concrete, physical sense of entering a gap. It can appear in literal descriptions of placement or movement, and less commonly in figurative language to suggest entering a figurative gap or opening, though more typical figurative expressions use other constructions. The word is part of standard Finnish vocabulary and demonstrates how the illative case conveys direction toward a discrete interior space.

See also: rako, Finnish grammar, illative case.