Derailleur gears operates the lever while pedalling, the change in cable tension moves the chain-guide from side to side, "derailing" the chain onto different sprockets. For more information about the choice of particular gear ratios and sprocket sizes, see Bicycle gearing. "Derailleur" is a French word, spelled "dérailleur" in French, derived from the derailment of a train from its tracks. Its first recorded use was 1930. At least one notable bicycle industry author has attempted to promote the anglicized spelling of "derailer". As of 2013, however, neither Merriam-Webster nor the Oxford English Dictionary has an entry for "derailer". Various derailleur systems were
Yiddish words used in English sometimes in the same sentence. For instance, the word פֿאַרקאַקטע may be spelled "farkakte", "ferkockte", "verkackte", among others. In its roots, though, Yiddish (whether used as English slang or not) is fundamentally mediaeval High German; although mediaeval German suffered from the same vagaries in spelling, it later became standardised in Modern High German. This list shall use the same conventions as Modern High German, with the exception of certain words, the spellings of which have been standardised. Furthermore, common nouns shall be left lowercase, as in English. Yiddish words used in English Yiddish words may be used in a primarily