While the alteration can be synchronically described as a rule of the type z > c, it is evident that historically the affricate represents the original sound, and in intervocalic position the affricate became assibilated
(*c > *z > z, z).
On the other hand, Bradley (2005) reports that in Standard Spanish /rC/ clusters where the rhotic appears in coda position there is also evidence of a svarabhakti vowel segment between the rhotic and the following consonant segment, but in casual speech in Highland Ecuador, this intervening vowel segment often tends to disappear, and an assibilated [r] surfaces instead before consonants that have the same voicing value (e.
Umana-Aguilar (1981) describes a tap which is phonetically realized as an assibilated retroflex in syllable-final position, especially phrase-finally.
Calvo-Shadid & Portilla-Chaves (1998) describe three assibilated retroflex variations of the rhotics found in the formal speech of four female informants in the capital area of Costa Rica.
In sum, Luick assumed that in word-final position [k] became assibilated
in all dialects.
17) In West Greenlandic (see 11q) singleton and geminate /t/ are assibilated to [ts] and [tts], respectively, before /i/ but this language has no /d/, and /j/ only occurs intervocalically (see Fortescue 1984: 335; Dorais 1986: 45).
According to Carlton (1990: 114) Proto-Slavic *t and *d assibilated in the various daughter languages before *j, e.
Indo-European *t assibilated to a (posterior) affricate before /i j/ in Hittite (see 19a), e.
Greek [TEXT NOT REPRODUCIBLE IN ASCII] of this period was probably slightly assibilated
anyway (as it is, e.
This last shows the distinction, which was later to become absolute, between assibilated
and unassibilated ti.
The analysis of the Spanish data produced by speakers from the Costa Rican Central Valley evidenced that the trill has been substituted by an assibilated rhotic, while the tap also undergoes assibilation in three contexts: 1) in complex /tr/ onset clusters, 2) word-medially in complex onsets that come after a voiced coronal /l/ or /n/, and 3) in /rC/ clusters where the rhotic is in coda position, always before one or more bound clitic morphemes.
Several researchers have looked at such dialectal variation and they report that some regions in Guatemala, Argentina, Cuba, Chile, Colombia, Panama, Ecuador, Paraguay, Bolivia, Peru, Mexico, the United States, Spain (from Logrono to Zaragoza), and Costa Rica have an assibilated rhotic, that is, an alveolar tap or trill that is phonetically realized as a strident fricative [[?