siististi

Siististi is a Finnish adverb meaning neatly, tidily, cleanly, or properly. It is formed from the adjective siisti, which means neat, tidy, or clean, by adding the common adverbial suffix -sti. The word is used to describe how an action is performed, or the manner in which something is done or presented.

In usage, siististi modifies verbs and describes manner. Examples include: Hän teki työn siististi (He did the work neatly), Hän pukeutui siististi (He dressed neatly), and Ruoka tarjottiin siististi aseteltuna lautaselle (The food was served neatly on the plate). It can also convey a sense of acting properly or appropriately in everyday speech: Hän käyttäytyi siististi during the meeting (He behaved properly during the meeting).

Grammatical notes: siisti is the adjective meaning neat or clean; adding -sti forms an adverb that describes the manner of an action. Finnish adverbs formed with -sti are common and include many everyday expressions such as nopeasti (quickly) from nopea (fast) and kauniisti (beautifully) from kaunis (beautiful).

Siististi is widely used in spoken Finnish, journalism, and writing to emphasize orderly or proper execution. It is neutral in tone and appropriate in both informal and formal contexts, though more precise or descriptive options (such as huolellisesti for carefully) may be used when more nuance is needed.