Word square place names). However, 11-squares are possible if words from a number of languages are allowed ("Word Ways", August 2004 and May 2005). It is possible to estimate the degree of difficulty of constructing word squares. 5-squares can be constructed with as little as a 250-word vocabulary. Roughly, for each step upwards, one needs four times the number of words. For a 9-square, one needs over 60,000 9-letter words, which is practically all of those in single very large dictionaries. For large squares, the vocabulary prevents selecting more "desirable" words (i.e. words that are unhyphenated, in common use, without contrived inflections,
Longest word in English Sylvia Plath made mention of it in her semi-autobiographical novel "The Bell Jar", when the protagonist was reading "Finnegans Wake". "Supercalifragilisticexpialidocious", the 34-letter title of a song from the movie "Mary Poppins", does appear in several dictionaries, but only as a proper noun defined in reference to the song title. The attributed meaning is "a word that you say when you don't know what to say." The idea and invention of the word is credited to songwriters Robert and Richard Sherman. The English language permits the legitimate extension of existing words to serve new purposes by the addition of prefixes