A Grammar of Tamashek (Tuareg of Mali)

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3.5 Syntactically controlled phonological processes 157

The reason why the 3FeSg subject forms are singled out for this special

treatment is not hard to see. For a Lolmpf like -tatt- 'eat', the 3FeSg subject

form is the only form that (after deletion of 3FeSgS prefix t-) has neither an

audible (and generally syllabic) subject prefix that would obviate Rightward

Accent Shift, nor a syllabic subject suffix that (after a monosyllabic stem)

could host a rightward-shifted accent. This applies not only to -tdtt- but to all

LoImpfP stems, since they are overwhelmingly C-initial. Admittedly, there is

one verb type, namely -vPvC-, that has two alternative LoImpfP stem shapes,

C-initial -t-aPPdC- and V-initial-aPPdC- (§7.3.1.1). In theory, the V-initial

variant would allow 3FeSgS prefix t- to be audible. However, given that

-t-aPPciC- and -aPPaC- are in free variation, and that 3FeSgS t- is zeroed

before a C, when we hear a verb form [taPiaC] there is no way to tell whether

this represents t-aPPdC- with audible 3FeSgS t- plus stem -aPPaC-, or

0-t-3PPdC- with zeroed 3FeSgS prefix plus stem -t-aPPdC-.

Since LoImpfP stems like -baddaed- 'stand up' retain the ablaut-induced

accent (from formative χ-pcl) even while erasing the ablaut-induced

lengthening (formative χ-pcl), producing -baeddaed- or with Rightward

Accent Shift -baeddaed- (e.g. in 3MaPl basddaed-asn), this morphological form

(i.e. LoImpfP in definite relative) is distinct from the Prohibitive stem, which

completely lacks χ-pcl as well as χ-pcl, hence -baeddaed- (e.g. waer basddsed

'don't stand up!', arguably with deleted It-/ prefix).

The cases we have considered represent the only verb stems where

Rightward Accent Shift runs afoul of a rule deleting stem V's. This suggests a

derivation for unaccented 0-tastt in (134.a) where Rightward Accent Shift in

fact does shift accent onto the stem-final /A/, whereupon Stem-Final i/A-

Deletion (29) zeroes the /A/, and the ablaut-induced accent on the zeroed V

disappears. Technically, we could think of this as a delinking of the accent,

which ends up with no vowel to attach to.

However, there is another construction involving accent erasure that must

also be considered before any rules are formulated. Like the process affecting

3FeSg subject definite relatives, this one involves erasure of a marked accent

when a stem-final V disappears. However, this time we are dealing with nouns

rather than verbs, the loss of the V is due to VV-Contraction (39.b) rather

than Stem-Final i/A-Deletion (29), and there is no phonological reason why

the contracted vowel could not host the accent. Moreover, there is no reason to

think that Rightward Accent Shift is involved.

The relevant cases here are agentives of the type e-m-asqr 'killer', PI

"i-m-aeqr-an (§8.8.1), including causative agentives of the type e-m-aes-aeqq

'cook', PI i-m-ses-aeqq-an (§8.8.4), and VblN's of the type α-fsyk 'being

searched', PI Ί-fayk-an (§8.6.1.4). In these forms, there is a marked accent in

the Sg that disappears in the PI. These agentives and VblN's are based on

V-final stems, here -νηγυ- 'kill', -νηηυ- 'be cooked', and -fvyku- 'be

searched'. In the Sg forms, we can assume that Stem-Final i/A-Deletion (29)

has deleted a final V, so the surface final-syllable accent can be derived from a

(marked) penultimate accent (i.e. with χ-pen), e.g. underlying agentive
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