tummempiin
The word "tummempiin" is the illative plural form of the Finnish adjective "tumma". "Tumma" translates to "dark" in English and can describe a variety of qualities, including color, shade, mood, or taste. In its illative plural form, "tummempiin" indicates movement into a state or condition of being "darker" in a plural sense.
For example, in Finnish, one might say "värit muuttuivat tummempiin sävyihin," which translates to "the colors
Beyond color, "tummempiin" can also describe a mood becoming more somber or a flavor becoming more intense