myötöopimusen

The term "myötöopimusen" is not a recognized word in Finnish or any other commonly spoken language. It appears to be a misspelling or a non-existent term. It is possible that it is a neologism, a very obscure technical term, or a typographical error. Without further context, it is impossible to provide a meaningful definition or explanation. If "myötöopimusen" was intended to refer to a specific concept, clarification of the correct spelling or the intended meaning would be necessary. Finnish compound words are often formed by combining existing words, and it's conceivable that this is an attempt at such a formation, but the components do not yield a recognizable meaning in standard Finnish.