1 Introduction
In this paper, I present a formal account of diphthong formation and hiatus resolution (HR) within Element Theory (Kaye, Lowenstamm and Vergnaud 1985, Charette and Göksel 1998, Backley 2011) and CV phonology (Lowenstamm 1996). While this article assumes some familiarity with the theories at hand, I discuss relevant concepts throughout. I focus on data from Tokyo and Owari Japanese. The first claim is that HR has a single trigger within various languages, which is the presence of an empty position and its need to be governed. The second claim is that diphthongs are formed through Intervocalic Government, which I propose here, and which is sensitive to the elemental structure in each vocalic position. The overall claim is that HR processes in general have one trigger with multiple repair solutions, with surface hiatus being fundamentally dispreferred and marked in phonological structures.
1.1 Hiatus, diphthongs and hiatus resolution
Diphthongs and hiatus have received a number of definitions over the years (Andersen 1972, Casali 2011), with a general understanding that both diphthongs and vowels in hiatus are adjacent heterogenous vocoids. In terms of phonological representation, vowels in hiatus are formed of two adjacent and independent nuclei, while a heavy diphthong is formed of two vocoids associated to a branching nucleus or the same syllable, exhibiting a unified metrical behaviour and patterning with long vowels (Selkirk 1982; Kaye and Lowenstamm 1984; Levin 1985; Kaye, Lowenstamm and Vergnaud 1990). Light diphthongs, or glide-vowel sequences, pattern metrically and phonotactically as short vowels and are, for example, represented as a vowel with a preceding glide attached to either the Onset or Nucleus (Kaye and Lowenstamm 1984; Kaye, Lowenstamm and Vergnaud 1990). More neutrally, I define hiatus as a bimoraic heterogenous V1V2 sequence where V2 is independent for metrical purposes. I define diphthongs as bimoraic heterogenous V1V2 sequences where V2 is not a possible site of accent, tone or stress. This papers focuses on the representation and triggering context of hiatus and heavy diphthongs with particular reference to Japanese.
Languages often contain both diphthongs and hiatus, with Tokyo Japan...