The phonemes , , and are pronounced as voiced
stops only after a pause, after a
nasal consonant, or—in the case of —after a
lateral consonant; in all other contexts, they are realized as
approximants (namely , hereafter represented without the
downtacks) or
fricatives. In Castilian Spanish, its allophones in word-initial position include the palatal approximant , the palatal fricative , the palatal
affricate and the palatal stop . in other contexts, /ʝ/ is generally realized as an approximant . In
Rioplatense Spanish, spoken across Argentina and Uruguay, the
voiced palato-alveolar fricative is used in place of and , a feature called "
zheísmo". In the last few decades, it has further become popular, particularly among younger speakers in Argentina and Uruguay, to de-voice to ("
sheísmo"). The phone occurs as a
deaffricated pronunciation of in some other dialects (most notably, Northern Mexican Spanish, informal Chilean Spanish, and some Caribbean and Andalusian accents). Most varieties spoken in Spain, including those prevalent on radio and television, have a phonemic contrast between and . Speakers with this contrast (which is called
distinción) use in words spelled with , such as 'house' , and in words spelled with or (when it occurs before or ), such as 'hunt' . However, speakers in parts of southern Spain, the Canary Islands, and all of Latin America lack this distinction, merging both consonants as . The use of in place of is called
seseo. Some speakers in southernmost Spain (especially coastal Andalusia) merge both consonants as : this is called
ceceo, since sounds similar to . This "ceceo" is not entirely unknown in the Americas, especially in coastal Peru. The exact pronunciation of
varies widely by dialect. In many varieties, but
not in Castilian Spanish, it may be pronounced as [h] or omitted entirely ([∅]), especially at the end of a syllable. The phonemes and are
laminal denti-alveolar (). The phoneme becomes
dental before denti-alveolar consonants, According to some authors, is
post-velar or
uvular in the Spanish of northern and central Spain. Others describe as velar in European Spanish, with a
uvular allophone () appearing before and (including when is in the syllable onset as ). In some Extremaduran, western Andalusian, and American varieties, this softened realization of , when it occurs before the non-syllabic allophone of (), is subject to merger with ; in some areas the homophony of / is resolved by replacing with or .
Consonant neutralizations and assimilations Some of the
phonemic contrasts between consonants in Spanish are lost in certain phonological environments, especially at the end of a syllable. In these cases, the phonemic contrast is said to be
neutralized.
Sonorants Nasals and laterals At the start of a syllable, there is a contrast between three
nasal consonants: , , and (as in
cama 'bed',
cana 'grey hair',
caña 'sugar cane'), but at the end of a syllable, this contrast is generally neutralized, as nasals assimilate to the
place of articulation of the following consonant Within a morpheme, a syllable-final nasal is obligatorily pronounced with the same place of articulation as a following stop consonant, as in
banco . An exception to coda nasal place assimilation is the sequence that can be found in the middle of words such as , , . Only one nasal consonant, , can occur at the end of words in native vocabulary. When followed by a pause, is pronounced by most speakers as alveolar (though in
Caribbean varieties, it may be pronounced instead as , or omitted with nasalization of the preceding vowel). When followed by another consonant, morpheme-final shows variable place assimilation depending on speech rate and style. Similarly, assimilates to the place of articulation of a following
coronal consonant, i.e. a consonant that is interdental, dental, alveolar, or palatal. In dialects that maintain the use of , there is no contrast between and in coda position, and syllable-final appears only as an allophone of in rapid speech.
Rhotics The
alveolar trill and the
alveolar tap are in phonemic contrast word-internally between vowels (as in
carro 'car' vs.
caro 'expensive'), but are otherwise in
complementary distribution, as long as syllable division is taken into account: the tap occurs after any syllable-initial consonant, while the trill occurs after any syllable-final consonant. Only the trill can occur at the start of a word (e.g.
el rey 'the king',
la reina 'the queen') or after a syllable-final (coda) consonant (e.g.
alrededor,
enriquecer,
desratizar). Only the tap can occur after a word-initial
obstruent consonant (e.g.
tres 'three',
frío 'cold'). Either a trill or a tap can occur word-medially after , , depending on whether the rhotic consonant is pronounced in the same syllable as the preceding obstruent (forming a complex onset cluster) or in a separate syllable (with the obstruent forming the coda of the preceding syllable). The tap is found in words where no morpheme boundary separates the obstruent from the following rhotic consonant, such as
sobre 'over',
madre 'mother',
ministro 'minister'. The trill is only found in words where the rhotic consonant is preceded by a morpheme boundary and thus a syllable boundary, such as
subrayar, ciudadrealeño, postromántico; compare the corresponding word-initial trills in
raya 'line',
Ciudad Real "
Ciudad Real", and
romántico "Romantic". In syllable-final position before consonants inside a word, the tap is more frequent, but the trill can also occur (especially in emphatic or oratorical style) with no semantic difference—thus
arma ('weapon') may be either (tap) or (trill). In
word-final position the rhotic is usually: • either a tap or a trill when followed by a consonant or a pause, as in
amo paterno ('paternal love'), the former being more common; • a tap when followed by a vowel-initial word, as in
amo eterno ('eternal love'). Morphologically, a word-final rhotic always corresponds to the tapped in related words. Thus the word 'smell' is related to 'smells, smelly' and not to . The tap/trill alternation has prompted a number of authors to postulate a single
underlying rhotic; the intervocalic contrast then results from
gemination (e.g.
tierra > 'earth').
Obstruents The phonemes , , may be voiced before voiced consonants, as in ('jasmine') , ('feature') , and ('
Afghanistan') . There is a certain amount of free variation in this, so can be pronounced or . This is consistently fricative, whereas the allophone of varies between a fricative and an approximant, like , and . In strict IPA, they would be written as and , respectively. Such voicing may occur across word boundaries, causing ('Merry Christmas') to be pronounced . More so, in some words now spelled with
-z- before a voiced consonant, the phoneme is in fact diachronically derived from original realization of the phoneme. For example, comes from Old Spanish , and comes from Old Spanish , from Latin . Both in casual and formal speech, there is no phonemic contrast between
voiced and voiceless consonants placed in syllable-final position. The merged phoneme is typically pronounced as a relaxed, voiced
fricative or
approximant, although a variety of other realizations are also possible. So the clusters -- and -- in the words and are pronounced exactly the same way: • • Similarly, the spellings and are often merged in pronunciation, as well as -- and --: • • • • ==Semivowels==