1. "Megnyugtatóbbátételhez" (meaning "for making more reassuring") is often cited as the longest word with 22 letters.
2. "Szemöldökömfelettileg" (meaning "above my eyebrow") is also considered a contender with 21 letters.
Technically, "Szemöldökömfelettileg" is slightly shorter, but both words are considered incredibly long for everyday Hungarian use.
It's worth noting that both words are formed by combining multiple morphemes (meaningful units of language), which is a common feature of Hungarian grammar. This can create very long words, even though they are composed of familiar building blocks.