käytänön
Käytänön is not a standard entry in Finnish dictionaries. It appears to be a misspelling or nonstandard variant of the word käytäntö or its inflected forms. The correct base noun is käytäntö, which means practice, convention, method, or habitual way of doing things. In use, it often refers to established procedures or customary ways within a context such as an organization, profession, or society.
The most common related form is käytäntö in the nominative singular. Its inflected forms include käytäntöä
Käytäntö is related to the adjective käytännöllinen, meaning practical, as well as the adverb oikeastaan or
If you encountered käytänön in a text, it is likely a typographical error for käytännön, the genitive