In this paper, we argue that Yiddish potentially has the longest word of any language. This word has 865 characters. Including neologisms and allowing for word borrowings from other source languages, it is argued here that Yiddish has a longest word length at least one, two or three more than that in any other language. It is also arguably the case that Yiddish has a word length at least twice that in any other language (2N 1, 2N 2 or 2N 3, depending on various aspects of the source language where N is the longest word in the sourcelanguage). This is due to various aspects of other languages include the use of abugidas in Sanskrit (which may be said to currently hold the record), the regular use of certain prefixes to indicate neologisms in Yiddish and the phenomenon of shm-reduplication in Yiddish.