2 The opposition eə ≠ iə has little distinctive value. eə, in 26 out of the 32 words in which it was recorded, followed a consonant with dental or alveolar articulation—t(h), d, n, (C)r, (C)1, SW—while iə followed such a consonant in only 13 out of 57 words, against an expectation on random distribution of 14 and 25 words respectively.
Apart from this limited opposition it is possible to regard the ə-vowels as constituting a phonological series /ə/, /yə/, /wə/, in which ə is the locus of a ternary prosodie system. Diphthongal /y/ and /w/ are differentiated from y and w as terms of the secondary system described on p. 549 (e.g. in ky
ŋ, kwat) by their occurrence following all types of initial, as opposed to the limited C1 possibilities of the secondary pattern: hreəŋ, kluəy are possible, but not e.g. *hrya, *klwa. They are transcribed as i, u in order to make clear this distinction between elements analysed as vocalic and consonantal respectively.