The Estremenhan dialects present the following characteristics:[1]
A generalized monophthongization of the
diphthong [ow]. For example, "touro" (bull) and "roupa" (clothes) passes to "tôro" and "rôpa".
In certain subregions, such as saloia (the outskirts of Lisbon), a monophthongization of the diphthong [ej] occurs. For example, "manêra" instead of "maneira" (manner), although this has evolved into [ɐj] in the Lisbon dialect ("manâira").
The predorsodental
sibilants, that is, /s/ and /z/, are pronounced as in the European pattern and are well distinguished from the lower x and the j, contrary to what happens with the northern dialects.
^VIANNA, Aniceto dos Reis Gonçalves (1892): Exposição da pronuncia normal portuguesa para uso de nacionais e estrangeiros, Lisboa, Imprensa Nacional (Memória apresentada na 10ª Sessão do Congresso Internacional dos Orientalistas), reimpresso in Estudos de fonética portuguesa, Lisboa : Imprensa Nacional /Casa da Moeda, 1973, pp. 153 - 257; disponível online na
Biblioteca Nacional Digital.