kahviin

Kahviin is the illative form of kahvi, the Finnish noun for coffee. The illative marks direction toward or into something, or the target of an action, and kahviin is used mainly with verbs that describe adding to or preparing coffee. The form kahviin is created by attaching the illative suffix -in to the stem kahvi.

In everyday Finnish, kahviin is commonly found in phrases describing what is added to coffee or how coffee is prepared. Examples include: "kaataa sokeria kahviin" (pour sugar into the coffee), "laittaa maitoa kahviin" (add milk to the coffee), and "sekoittaa kanelia kahviin" (stir cinnamon into the coffee). The illative is distinct from cases that describe location, such as inessive "kahvissa" (in the coffee) or partitive "kahvia" (coffee, as a direct object), which are used in different contexts.

The illative is one of Finnish cases used to express direction, destination, or target, and is common in cooking, recipes, cafés, and everyday speech when discussing beverage preparation. Mastery of kahviin helps in interpreting sentences that describe modifications to coffee or actions performed on the beverage.