This is the 173rd most frequent Hungarian word.
amelynek
"Amelynek" means "of which" or "whose" in English.
The word 'amelynek' is used as a relative pronoun in the dative case, linking the noun 'könyv' (book) to the possession of its 'borítója' (cover).
Ez az a könyv, amelynek borítóját megterveztem.
This is the book whose cover I designed.
Here, 'amelynek' connects the noun 'ház' (house) to its 'kertjében' (in the garden), indicating a relationship of possession.
Van egy ház a városban, amelynek kertjében szép virágok nyílnak.
There is a house in the town whose garden houses beautiful flowers.
In this sentence, 'amelynek' serves to connect 'iskola' (school) to 'falait' (its walls), functioning as a possessive relative pronoun.