epäbagillisesti
epäbagillisesti is a Finnish adverb. It is the adverbial form of the adjective epäbagillinen. The prefix epä- negates the meaning of the word it is attached to. Therefore, epäbagillinen means not "bagillinen". The word bagillinen itself is not a standard Finnish word. It appears to be a neologism or a term used in a very specific context, possibly informal or slang, or related to a particular fictional work or subculture. Without further context, the exact meaning of "bagillinen" is unknown, making the precise meaning of "epäbagillisesti" also ambiguous.
If "bagillinen" were to hypothetically mean something like "related to a bag" or "having bags," then "epäbagillisesti"
In linguistic analysis, the formation of "epäbagillisesti" follows a common pattern in Finnish: adjective stem + -sti