végzéseketvégzéseiket
Végzéseketvégzéseiket is not a standard or widely recognized term in Hungarian. In linguistic or encyclopedic contexts, it is typically treated as a coined or nonce form used to illustrate extreme word formation rather than as an established entry in dictionaries. The string is sometimes discussed as a playful or theoretical example of how Hungarian can stack affixes and nominalizations in a single, long word.
The form appears to be built from several Hungarian morphemes around the root related to végzés (completion,
Morphologically, the case and possessive suffixes illustrate how Hungarian can multiply affixes onto a base noun
In practice, adults and writers would avoid or rephrase such a construction in everyday language. It is