Note that where the stress is fixed in relation to the beginning of the word, the
stress is also not mobile. But it remains mobile in those languages with the stress
fixed in relation to the end of the word, since endings within a paradigm may have
varying numbers of syllables. For Polish in particular this is an important feature,
and possibly one which was a motive force in the shift from initial to penult. It is less
important for Macedonian, since the nominal system is now substantially without
inflexion, so that mobile stress is really meaningful only for verbs. Ultimately this
sort of mobility is of limited importance, since the opposition between forms must
be signalled by segmental differences, not suprasegmental ones (cf. Russian, where
mobility of stress can be meaningful, e.g. ruki ‘hand’ may be [GenSg] or [NomPl]
depending on stress position (4.2.4)).
3.2.4.2 Quantity
Vowel length became phonemic (again) in West and part of South Slavic, but
ceased to be related to quality almost everywhere, including East Slavic. In the
areas with free stress, it tended to be a concomitant of the stressed syllable, and this
is the case in the ‘‘strong-stress’’ languages – Russian, Belarusian and Bulgarian,
and to a lesser extent in Ukrainian.
Quantity developed most strongly as a phonemic feature in West Slavic, at the
expense of free stress, and supported by extensive contraction, of which Czech was
the centre (see 3.2.1.6). It survived, however, only in Czech and Slovak, and was
lost (c. sixteenth century) in Polish and Sorbian. Slovak subsequently weakened the
range of quantity with the so-called ‘‘Rhythmic Law’’, whereby two consecutive
long syllables are avoided (diphthongs behave like long vowels: 3.5.2).
In South Slavic quantity became phonemic in B/C/S and Slovenian, though
never independently of either stress or pitch. The retraction of stress in B/C/S
(above) made pitch a much more important feature, and it also restricted the
domain of length as it did that of stress, since no pretonic vowel may be long
(though there are relatively few pretonic vowels, given the rarity of non-initial
stress). However, the length of originally long stressed syllables was retained, so
that there could still be an opposition in post-tonic position. Slovenian is the one
language in which length has remained associated with quality to a small extent,
since its phoneme /
e
/ may not be long. For other vowels length is limited to stressed
position.
The remaining languages (East Slavic and Bulgarian/Macedonian) have aban-
doned length as a potential phonemic feature. There are some indications that
Ukrainian did develop it briefly in the Common East Slavic (Old Russian) period
through compensatory lengthening of vowels in a syllable before a lost jer. This is
the normal explanation for the development of /o/ and /e/ to /i/ in such positions
152 3. Phonology