suupieleen

Suupieleen is a Finnish illative form of the noun suupieli, which refers to the corner of the mouth. In Finnish grammar, the illative case marks movement toward or into a location, so suupieleen is used when describing direction toward the mouth corner or into that area. The form is therefore a grammatical inflection rather than a standalone lexical item, and it appears in contexts where precise localization on the face is described, such as anatomical, clinical, or descriptive language, as well as in literary passages that mention facial expressions.

Usage notes emphasize that suupieleen is tied to the illative function and to the base noun suupieli. It is most common in written Finnish that requires exact facial localization, and less frequent in casual speech where broader terms for facial regions may be used instead. The term belongs to the broader category of Finnish case forms and illustrates how location and direction are encoded in Finnish nouns through inflection.

Related terms include the base noun suupieli (the corner of the mouth) and other inflected forms of the word in different cases, as well as general Finnish anatomical vocabulary. Suupieleen thus serves as a specific grammatical form used to convey movement toward a particular facial location within descriptive or technical text.