1.1 The problem
This book is an investigation of the relationship between phonetic processes and morphological structure. The type of question with which it is concerned may be illustrated on the basis of the following fragments of the verbal paradigm in three Italian dialects (A, B and C), illustrated in Table 1:
Table 1
| A | B | C | |
| korro | korro | korrÉ | āI runā |
| korri | kurri | KurrÉ | āyou runā |
| korre | korre | KorrÉ | āhe runsā |
In the fragment from dialect A, the morphosyntactic category of person is signalled solely by a set of inflectional suffixes. In B, in addition to the inflectional suffixes, there is an alternation in the stem vowel arising from METAPHONY, a phonetic assimilatory raising of stressed vowels, conditioned by a following unstressed high non-mid vowel (/i/ or /u/). As for C, a phonetic centralization process has neutralized the distinction between unstressed vowels, obscuring the original conditioning environment for metaphony: the metaphonic alternation remains as the sole indicator of the morphosyntactic category of person, originally signalled by the inflection. In other words, metaphony is clearly MORPHOLOGIZED. The nature of morphologization will be a central theme of this study, but it is very difficult to extract from the linguistic literature a coherent initial consensus on the phenomenon (cf. Roberge (1980:2f.)). The following, extremely general, formulation (similar to that offered by Kenstowicz and Kisseberth (1977:74)) might be taken as a starting point:1
Morphologization occurs when some aspect of a phonetic change is associated by speakers with some morphological category.
But one is bound to ask what āaspectā of the phonetic change is involved, and under what circumstances such āassociationā occurs. The answer may seem, in part, obvious: given that in dialect C the phonetic conditioning environment for metaphony has been altered and has merged irrecoverably with the reflexes of other unstressed final vowels, which never triggered metaphony, speakers of C must perforce associate the alternation, resulting historically from metaphony, with the morphosyntactic category of person. This may seem an unexceptionable claim, but we shall see that it is potentially controversial: some scholars would argue that the very existence of morphological paradigmatic alternation should not be assumed a priori. As for dialect B, the scope for controversy is more evident. Simple observation of the synchronic data permits a range of initial hypotheses about how speakers might account for metaphonic alternation. These might be purely phonological (as in (a) below), or purely morphological (as in (b)), or alternatively might combine, apparently redundantly, both morphological and phonological conditioning (as in (c)):
a. Phonological
i. Metaphonic alternation is produced by the phonetic assimilatory process.
ii. Metaphonic alternation is phonological, but not phonetic. The original phonetic motivation has disappeared, and speakers have a more or less arbitrary phonological rule substituting stressed /u/ for /o/ in the environment of a following unstressed /i/ or /u/.
b. Morphological
i. The metaphonic alternant is associated with -i, the inflectional exponent of [second person].
ii. The metaphonic alternant is associated directly with the morphosyntactic property of [second person].
c. Phonological and morphological (combinations of (a) and (b) above)
i. (ai) + (bi)
ii. (ai) + (bii)
iii. (aii) + (bi)
iv. (aii) + (bii).
Much of this book will be dedicated to establishing which of these analyses speakers have really made. Evidence will emerge in favour of (ci) or (cii): phonetic and morphological conditioning coexist; also, metaphonic alternation is probably directly associated with the morphosyntactic category, independently of the inflectional suffix. I shall show, moreover, that this apparently redundant combination of a phonetic process and morphological conditioning is not redundant at all, but involves an authentic interaction of phonetic and morphological factors, having distinctive and unique characteristics of its own.
1.2 The question of morphonology
The question of the relationship between phonetic processes and morphological paradigms has frequently occupied linguists over the past century. An account of theoretical approaches to this problem will be given in the following chapters. Suffice it to say here that, until recently, there had been a strong tendency to separate phonetic and morphological phenomena. In the late nineteenth and early twentieth centuries (cf. the writings of Kruszewski, Baudouin de Courtenay, Saussure) such separation followed from the lucid perception of the distinction between linguistic synchrony and diachrony, and in part reflected a reaction against the predominantly diachronic and principally phonetic preoccupations of Neogrammarian practice. Part of this reaction was the assumption of a dichotomy between alternation produced by āliveā phonetic processes, and alternation which was synchronically associated with morphological categories, and whose phonetic motivation was purely a matter of diachrony. An early, and characteristically farsighted, challenge to this dichotomy was issued by Sapir (1921:183f.):
I am inclined to believe that our present tendency to isolate phonetics and grammar as mutually irrelevant linguistic provinces is unfortunate. There are likely to be fundamental relations between them and their respective histories that we do not yet fully grasp.
The study of morphophonology,2 a term first given wide currency (in the significantly haplological form morphonology) by Trubetzkoy in 1929, originally dealt with the phonological shape of morphemes in general. Its main concern, however, came to be the description of the nature and function of phonological oppositions within morphological paradigms, and of the phonological environments in which such morphologically correlated oppositions were neutralized. In a forceful critique of classical morphonology, Martinet (1965) challenged the legitimacy of any postulated independent āmorphonologicalā domain: apparent alternations whose distribution is statable exclusively in terms of their phonological environment should be assigned to āphonologyā, while morphological alternations not uniquely attributable to phonological environment should be relegated to āmorphologyā. At the root of this distinction was a perception of the synchronic arbitrariness of the latter type of alternation: detached from its original phonological environment, āmorphonologicalā alternation merely becomes an arbitrary taxonomy of those phonemic oppositions whose distribution happens to coincide with alternating morphosyntactic categories. Indeed, such cases might not be essentially different from, say, paradigmatically alternating suffixes (e.g., the verbal inflections -o, -i, -e in the Italian dialects), each of which may have historical origins wholly independent from those of the other inflections.
One certainly finds a wide consensus among linguists that there exists no independent domain of morphonology (cf. Kilbury (1976:56ā68)). Dressler (1985a) surveys the gamut of possible criteria for the establishment of such an independent domain, and concludes that the range of putative āmorphonologicalā phenomena can in general be exhaustively factored into either phonological or morphological elements. However, the past twenty years have seen two notable interpretations of morphonology as a kind of āinterfaceā or interaction between morphology and phonology. One of these is Matthews (1972b) who, reacting against Martinet, argues for a conception of morphonology in which morphologically specified alternants furnish a āresolutionā of āliveā phonological constraints. The second is Dresslerās study, alluded to above, which conceives morphonology as a domain of synchronic interaction between phonological and morphological rules: in Dresslerās approach, a rule is morphonological to the extent that it simultaneously possesses some degree of morphological and phonological ānaturalnessā, the latter being usually identifiable with phonetic motivation. Dressler provides a wide (if not uniformly convincing) range of diachronic and acquisitional substantive evidence for the psychological reality of āinteractiveā morphonology, which suggests that morphological rules having a high degree of phonological ānaturalnessā are favoured in language retention and acquisition.
What I offer in this volume is a new kind of substantive diachronic evidence for an āinteractiveā conception of morphonology. I assert, in effect, that there exist phenomena which are simultaneously, and non-redundantly, both phonetically and morphologically conditioned. This view owes part of its inspiration to the studies by Matthews and Dressler cited above even if, as will become apparent, I dissent in some measure from their interpretation of the data they present. Most of Dresslerās examples involve rules which are morphonological in that they apparently retain some element of their original phonetic causation, but such examples are potentially open to the challenge that persistence of apparent ānaturalnessā is really synchronically redundant or arbitrary (cf. Hellberg (1978)). Moreover, morphologization is generally assumed by Dressler to entail some decrease in the phonological ānaturalnessā of a rule. I document the emergence of a variety of Italian metaphony whose naturalness (in the sense of phonetic motivation) is, on the contrary, as great in certain morphologically specified environments as anywhere else in the grammar. Such a rule simply cannot be factored into redundant, simultaneously operating, phonological and morphological conditionings. Seeking to identify the circumstances in which such interaction occurs, I reach a position akin to Matthewsā: the operation and resolution of incipient phon...