Myössekä
Myössekä is not a standard lexical item in Finnish dictionaries. It is sometimes encountered as a merged form of the adverb myös (also) and the coordinating conjunction sekä (as well as). In normal Finnish orthography the two elements are typically written separately, i.e., myös and sekä, and the combined form is treated as a stylistic or colloquial variant rather than a separate word with fixed rules. Because it is not an established entry, it appears mainly in informal writing, headlines, or attempts at emphasis rather than in formal style guides.
The general idea conveyed by the combination is to stress that multiple elements or aspects are included
Hän hallitsee sekä englannin että ruotsin kielen, ja hän myös hallitsee saksan. This shows the standard pattern
Some Finnish style guides suggest avoiding excessive stacking of myös with sekä, in favor of clearer constructions.