As
you study the theory of phonology (NP) during your Japanese language learning
classes, you would come to know that segmental processes are
either 'fortitions' or 'lenitions.' Fortitions, which include dissimilations,
diphthongizations, syllabications, and epentheses are designed to make
pronunciations more perceptible. Lenitions, which include assimilations,
monophthongizations, desyllabications, reductions, and deletions make segments
and sequences of segments easier to pronounce.
Lenitions
are generally context-sensitive or syntagmatic processes. Fortitions are
generally context free or paradigmatic processes and have the effect of
maximizing the phonetic properties of individual segments often heightening
their differences with neighbouring segments. Thus the context-free vowel de-nasalization
process in English maximizes the vocalic quality of the underlying vowel in
'can't.' It also accounts for the fact that English speakers perceive vowels as
non-nasal even when they superficially aren't. In addition to governing the
lexicon vowel de-nasalization in English also applies to foreign words such as
French [mamã] rendering it [mama] without nasalization. On the other hand
French [monami] without a nasalized first vowel is rendered [mõnami] by English
speakers. The nasal vowel in French [mamã] cannot survive in English because
there is no post-vocalic nasal context in which it can be derived by processes
of English. [khæ̃t] also lacks a postvocalic nasal, but its absence is due to
the process which deletes nasals between a preceding vowel and a following stop
in English. No such process exists for deleting postvocalic nasals not followed
by a stop. In the case of French [monami] the first vowel is followed by a postvocalic
nasal thus making vowel nasalization derivable in English.
In
NP, there are circumstances in which underlying representations may be deeper
than 'phonemic'. The case of syllable final obstruent devoicing in German
furnishes an example. In German the words 'organization' and 'many coloured'
are homophonous [bunt] in their unflected form, but their inflected alternates
are [bunde] and [bunte] respectively. The neutralization of [d,t] in the
uninflected form is due to obligatory application of the syllable final
obstruent devoicing process. Under such circumstances where the lexical
representation is relatable to the surface by processes a 'morphophonemic' underlying
representation is justified, and 'organization' is /bund/ – /bunde/ and 'many-colored'
is /bunt/ – /bunte/. There is one other case where non-allophonic alternates on
the surface may be represented by a single underlying representation, viz.
surface alternates that are derivable by optional application of processes e.g.
careful-casual alternates like 'hands' /hæ̃ndz/ → [hæ̃ndz] → [hæ̃nz] , due
to the optional application of [d] →
Ø / n_z.
Thus
in NP underlying segments are identical with their surface representations
except that ‘allophonic’ features are barred from underlying representation;
and 'morphophonemic' representations are legal where required by alternation
provided they are mapped to the surface by obligatory or optional processes of
the language.
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