peilissä

Peilissä is a Finnish word meaning "in the mirror." It is the inessive case form of peili (mirror), formed by adding the case ending -ssä to indicate location or state. In everyday use peilissä describes something or someone that is physically located inside or visible in a mirror, as in the sentence "Hän näki itsensä peilissä" ("He/she saw himself/herself in the mirror").

Beyond its literal sense, peilissä is often used metaphorically in Finnish to denote self-examination, introspection or reflection on one's actions and identity. Phrases related to mirrors, such as katsoa peiliin ("to look in the mirror"), commonly convey the idea of critical self-assessment. The term appears regularly in literature, music and popular discourse when writers and speakers explore themes of identity, perception and truth.

Grammatically, peilissä illustrates Finnish case marking that expresses spatial relations and abstract states; comparable forms include peilistä (elative, "out of the mirror") and peilille (allative, "onto the mirror"). In practical contexts the word is used in descriptions of appearance, grooming, photography and safety checks where mirrors provide visual feedback. As a concise lexical unit, peilissä encapsulates both concrete and figurative meanings related to mirror imagery in Finnish language and culture.