Neapolitan/Doubling

Doubling of Initial Consonants
In the Neapolitan Language, there are many words that will cause a doubling for the initial consonant. These are usually predictable, but you must memorize which words do and don't cause a doubling. Words that do, are shown below:
 * A plural feminine adjective preceding a plural feminine word will cause a doubling (vecchie ffemmene)
 * A singular neuter adjective preceding a singular neuter word will cause doubling (buono ppane)
 * The feminine plural article 'e ('e ffemene)
 * The neuter singular article 'o ('o ppane)
 * The conjunctions e and né (pane e ccaso)
 * The prepositions a, pe, and cu (a mme, pe tte)
 * Negation nu (nu mmo)
 * Indefinites ogne and cocche (ogne ccasa)
 * Interragative and relative che (che ffemene!)
 * accussí (accussí bbello)
 * From the verb essere but not songo (so' ppazzo)
 * chiu (chiu ppocco)
 * The number tre (tre ffemene)
 * chistu and chillu when referring to neuter nouns of indefinite quantities (chillu ppane)
 * lloco
 * From the verb stà (staje ssempe)
 * From the verb puté (pô ssapé)