>>Llanfairpwllgwyngyllgogerychwyrndrobwilliantysiliogogogoch
>>
>>(meaning St. Mary’s church in the hollow of the white hazel near the rapid whirlpool and the church of St. Tysilio by the red cave). Or as they say in Israel, "Oy Vay"
>
>I read in the Guinness' Book of World Records, that the name was actually constructed so that it would be the world's longest town name. But then again, so what? :-)

The longest (regular) word in Serbian is "prestolonaslednikovica"... 22 characters/sounds, and though it's a construct, it's still a regular word. Here's how:
- presto - throne
- naslediti - to inherit
- naslednik - heir
- prestolonaslednik - heir to the throne
- prestolonaslednikovica - his wife.

When counting the length of the nouns, we usually take nominative only, or else this wouldn't be the longest one. If we did, "prestolonaslednikovičinih" (genitive plural of possesive adjective derived from the noun, i.e. "of throne heir wife's") would be a candidate. Still, just miserable 25 character. Can't beat "elektromotorotekercselés" (electric motor rewinding) that I saw advertised on a fence in Hungary, with 24 characters without any suffixes. And in Hungarian, it's easier to get suffixes added than to breathe.