jánakjének
Jánakjének is not a standard dictionary entry in Hungarian. It is used in linguistic discussion as a hypothetical or illustrative string to show how suffixes can stack in Hungarian morphology. The form does not represent a common or accepted word, but rather a way to visualize how possessive and case endings attach to a stem when multiple layers of ownership and reference are involved.
In Hungarian, suffixes are attached in a fixed order to express ownership and grammatical role. A base
Real-world usage typically favors clear, smaller phrases such as házának (to his/her house) or barátjának háza
See also: Hungarian grammar, suffixal morphology, possessive suffixes, dative ending, nested possessives.