The European Union website has put that this are the longest words: Which is your favourite? Mine is nebeprisikiškiakopūsteliaudavome, we didn't pick rabbit cabbage. (Lithuanian) hahahaa German Rindfleischetikettierungsüberwachungsaufgabenübertragungsgesetz meaning “the law concerning the delegation of duties for the supervision of cattle marking and the labeling of beef’ is 63 letters long. Ancient Greek (Aristophanes - 183 letters) lopado-temacho-selacho-galeo-kranio-leipsano-drim-hupotrimmatosilphio-karabo-melito-katakechumeno-kichl-epikossuphophatto-peristeralektruon-opto-kephallio-kigklo-peleio-lagoio-siraio-baphe-traganopterugon meaning a dish compounded of all kinds of dainties, fish, fowl and sauces. German: Donaudampfschifffahrtsgesellschaftskapitänsmütze (48 letters) A cap used by a captain on the river of Donau. Dudelsackspfeifenmachergesellenprüfung (38 letters) exam for those who want to become a specialist in making pipes for bagpipes. Dutch: 48 letters kindercarnavalsoptochtvoorbereidingswerkzaamheden preparation activities for a children’s carnival procession Hungarian: megszentségtelenithetetlenségeskedéseltekért (44 letters) “for your unprofaneable actions” legmegvesztegethetetlenebbek (28 letters) the least corruptible ones Latin: 27 letters honorificabilitudinitatibus the state of being able to achieve honours (the longest word in Shakespeare from Love’s Labour’s Lost) Danish: arbejdsløshedsunderstøttelse (28 letters) unemployment benefit tilpasningsvanskeligheder (25 letters) adjustment difficulties Croatian: 26 letters prijestolonaslijednikovica the wife of a heir to the throne Czech: 30 letters nejneobhospodařovávatelnějšími the less farmed English pneumonoultramicroscopicsilicovolcanoconiosis (English: 45 letters) the longest word in a major dictionary, a technical word for a lung disease created by silica dust inhalation supercalifragilisticexpialidocious (English: 34 letters; from the Mary Poppins film and musical with a fanciful defintion) hippopotomonstrosesquipedalianism (English: 33 letters) which means the love of long words pseudopseudohypoparathyroidism (English: 30 letters) the longest noncoined word in a major dictionary for a specific inherited medical disorder floccinaucinihilipilification (English: 29 letters coined in 1741) meaning the categorizing of something that is useless or trivial (the longest unchallenged non-technical word) antidisestablishmentarianism (English: 28 letters) the longest non-coined and non-technical word Estonian: 19 letters raudteeülesõidukoht train crossing point Finnish: 25 letters käsipyyherullajärjestelmä an automatic towel system for drying your hands French: 25 letters anticonstitutionnellement unconstitutionally Italian:precipitevolissimevolmente (26 letters) in a too precipitate way psiconeuroendocrinoimmunologia (30 letters) is a discipline that deals with the relationship between the functioning of the nervous system, the immune system and the endocrine system Romanian: otorinolaringologie (19 letters) Otorhinolaringology sternocleidomastoidian (22 letters) The sternocleidomastoid muscle is located in the front of the neck Lithuanian: 30 letters nebeprisikiškiakopūsteliaudavomewe didn't pick rabbit cabbage Polish: 31 letters konstantynopolitańczykiewiczówna a girl living in Constantinople (modern Istanbul) Bulgarian: 40 letters neprotivokonstitutsionstvuvatelstvuvaytesomething against constitution Greek: υποδηματοεπιδιορθωτήριον(24 letters) By mending shoes ωτορινολαρυγγολόγος (19 letters) otolaryngologist (throat-ear-nose specialist) ακτινοχρυσοφαιδροβροντολαμπροφεγγοφωτοστόλιστος (47 letters) dressed in golden-shining, thundering and incandescent clothes σκουληκομυρμηγκότρυπα (21 letters) a hole with ants and worms Portuguese: 29 letters Anticonstitucionalissimamenteof or against the constitution of a state, organization Serbian: 22 lettersprestolonaslednikovica wife of Crown Prince Turkish: 28 letters Afyonkarahisarlilardanlarmış They are said to belong to the family that came from Afyonkarahisar Slovenian: 24 letters starocerkvenoslovanščina Old Church Slavik Language Slovak: 24 letters najnevypočítavateľnejšíthe most difficult exaple to calculate
достопримечательность is probably the longest Russian word I've learned (attraction, as in "tourist attraction")
