arvioinnein
Arvioinnein is not a standard entry in Finnish dictionaries. It appears to be a nonstandard or historical variant of the noun arviointi, which means evaluation or assessment. In contemporary Finnish, arviointi is the base form, and its normal inflection follows regular patterns (for example, arvioinnin for genitive singular, arvioinneissa for inessive plural, etc.). The form arvioinnein is not listed as a productive or recognized inflected form in modern grammar.
In practice, if arvioinnein is encountered in a text, it is typically treated as nonstandard, a dialectal
For clarity in most writing, it is better to use the standard forms of arviointi. When describing