Compound (linguistics)
Agglutinative languages tend to create very long words with derivational morphemes. Compounds may or may not require the use of derivational morphemes also.
The longest compounds in the world may be found in the Finnic and Germanic languages. In German, extremely 
extendable compound words can be found in the language of chemical compounds, where, in the cases of biochemistry and polymers, they can be practically unlimited in length, mostly because the German rule suggests combining all noun adjuncts with the noun as the very last stem. German examples include (color television set), (radio remote control), and the often quoted jocular word (originally only two Fs, Danube steamboat shipping company captain['s] hat), which can of course be made even longer and even more absurd, e.g. "Donaudampfschifffahrtsgesellschaftskapitänsmützenreinigungsausschreibungsverordnungsdiskussionsanfang" ("beginning of the discussion of a regulation on tendering of Danube steamboat shipping company captain hats") etc. According to several editions of the Guinness Book of World Records, the longest published German has 79 letters and is " Donaudampfschiffahrtselektrizitätenhauptbetriebswerkbauunterbeamtengesellschaft "("Association for Subordinate Officials of the Main Electric[ity] Maintenance Building of the Danube Steam Shipping"), but there is no evidence that this association ever actually existed. The word is so absurd that it was obviously invented as a joke, which is emphasized by the illogical use of the plural of "electricity".
The Memorandum
Length of words, like everything else in Ptydepe, is determined scientifically. The vocabulary of Ptydepe uses entropy encoding: shorter words have more common meanings. Therefore, the shortest word in Ptydepe, "gh", corresponds to what is so far known to be the most general term in natural language, "whatever". (The longest word in Ptydepe, which contains 319 letters, is the word for "wombat" in an English translation. However in the Czech original it is a name for a nonexistent member of the genus Apus, rorýs říční.) Theoretically an even shorter word than "gh" exists in Ptydepe, namely "f", but it has no meaning assigned and is held in reserve in case a more general term than "whatever" is discovered.