According to my native Hungarian speaker gf, this does not sound like a real word, it sounds like it's made up specifically to be long.

That's because if it was some niche technical word from some theological academic paper, it wouldn't be in the colloquial second person, it'd be in the polite/official second person or third person.

If it isn't a niche technical word, then due to Hungarian's suffixoidal nature, somebody just kept on adding semi-random suffixes to grow the word just to see what happens.

same vibes

If you want to hear this pronounced, listen to “Big Church” by Sunn O))). Vocalist, Attila Csihar, tends to use Hungarian lyrics.

If you haven’t listened to Sunn O))) before…it’s the weird side of metal. Powerful speakers recommended, especially heavy on the bass. You want to feel it in your chest. The album it’s on, “Monoliths & Dimensions,” is about 53 and a half minutes long but consists of 4 tracks, with “Big Church” being the shortest at 9:43.

And yes, a normal Hungarian can understand it. so not like pneumonoultramicroscopicsilicovolcanoconiosis. (i typed that from memory),