melyben

melyben

"In which" or "wherein."

In this case, as a relative pronoun ('in which'), it applies to 'doboz' ('box') specifying where the memories were stored.

Találtam egy dobozt, melyben régi emlékeket őriztek.

I found a box in which old memories were kept.

Used as a relative pronoun ('in which') to introduce a relative clause modifying 'ház' ('house').

Ez az a ház, melyben lakom.

This is the house in which I live.

Here, as a relative pronoun ('in which'), it refers to 'könyv' ('book') indicating content.

Van egy könyv a polcon, melyben különleges történetek vannak.

There is a book on the shelf in which unique stories are contained.