This is the 613th most frequent Hungarian word.
melyet
"Which" or "that" (relative pronoun).
Relative pronoun introducing a subordinate clause, referring to 'ház' (house).
Ez az a ház, melyet meg akarok vásárolni.
This is the house that I want to buy.
Relative pronoun introducing a relative clause, referring to 'könyv' (book).
A könyv, melyet olvastam, nagyon érdekes volt.
The book that I read was very interesting.
Relative pronoun introducing a relative clause, referring to 'szép festmény' (beautiful painting).