päällekkäisiksi

Päällekkäisiksi is a Finnish linguistic form derived from the adjective päällekkäinen, which means overlapping or stacked. The suffix -ksi indicates a change of state or turning into something, so päällekkäisiksi expresses becoming overlapping or layered in a plural context. It is used in sentences where the subject changes into a state of being overlapped or arranged on top of one another.

In Finnish grammar, päällekkäisiksi is the translative form of päällekkäinen that agrees with a plural subject. It is often found in technical or descriptive writing about physical arrangements, such as materials, layers, or structures, but can also appear in more abstract descriptions of schedules or plans that have become overlapping.

Common contexts include descriptions of layering or stacking in construction, manufacturing, textiles, geology, or mapping, where components are described as having become päällekkäisiksi. For example, kerrokset tulivat päällekkäisiksi means “the layers became overlapped” or “layers were stacked on top of one another.” The term can also describe overlapping tasks or events in planning when resources or activities inadvertently coincide.

Related terms include päällekkäisyys, the noun meaning overlap or redundancy, and päällekkäinen, the base adjective meaning overlapping. Päällekkäisiksi is mainly a descriptive, context-dependent form used to express a transformed state rather than a standalone concept.