East Cushitic and Omotic passive *-ad’-
I’ve been working on an overview of the morphological arguments for which language families do and do not belong to Afroasiatic. One of the features you find in nearly every branch of Afroasiatic is a system of derivational affixes where *s forms causatives, *m (*n in Semitic and Egyptian) forms some kind of middle, and *t forms reflexives, passives etc. For example, Biblical Hebrew (the *s turns into h or ʔ in most West Semitic languages):
- קָדֵשׁ qāḏēš ‘it is sacred’ (basic verb)
- הִקְדִּישׁ hiqdīš ‘he made sacred’ (causative)
- נִקְדַּשׁ niqdaš ‘he showed himself sacred’ (middle)
- הִתְקַדֵּשׁ hiṯqaddēš ‘he sanctified himself’ (reflexive)
The *m/*n and *t are close in meaning, and sometimes you’ll see *m/*n in one language in a function that *t fulfills in another.
In East Cushitic, the passive suffix *-at- has some allomorphs (variant forms). Hayward (1984, paywall), reconstructs a paradigm where they are distributed according to the person/number/gender of the verb:
1sg.*-ad’-2sg.*-at-3m.sg.*-at-3f.sg.*-at-1pl.*-an-2pl.*-at-3pl.*-at-Looking at the subject-marking suffixes that would follow this suffix, it becomes clear that the 1pl. form got its *n through assimilation to the following *n. But it isn’t clear where the glottalized (so, ejective or implosive) *d’ in the 1sg. comes from, or why the 1sg. form is different from the 3sg.:1
1sg.*-V2sg.*-tV3m.sg.*-V3f.sg.*-tV1pl.*-nV2pl.*-tVVni3pl.*-VVniIf we look at the matching paradigm in Proto-Agaw (Central Cushitic), or at the historically related prefix conjugation in East Cushitic, Agaw, or Semitic, we see that the 1sg. is marked with ʔ, against y for the 3m.sg. and 3pl. Now the Proto-East-Cushitic passive paradigm makes sense: 1sg. *-at-ʔV assimilated to *-ad’-ʔV, just as 1pl. *-at-nV became *-an-nV. So we’ve got East Cushitic evidence for 1sg. *ʔ as well. That’s cool.
Map of Afroasiatic languages by Wikimedia user Noahedits. Most of the Cushitic south of the Eritrean border is East Cushitic.Omotic is a group of Ethiopian languages that were briefly considered West Cushitic, but ejected from Cushitic in the 1970s. It’s a diverse group and most scholars think it actually consists of two to four unrelated families. Serious doubts have been raised about whether any of them is even Afroasiatic in the first place.
So far I’ve looked at two of the smaller families, Aari-Banna (= Aroid = South Omotic) and Dizoid (= Majoid = part of North Omotic, allegedly). Morphologically, there’s very little there that looks Afroasiatic. But they have the derivational affixes we’ve been talking about: cf. Hamar (Aari-Banna) causative -(i)s, passive –(a)ɗ– (that’s an implosive), and vestigial –Vm- with a range of mediopassive and imperfective meanings (Petrollino 2016); Sheko (Dizoid) causative -s, passive -t’ (that’s an ejective), middle -n̩ (a syllabic nasal that assimilates to the preceding consonant; Hellenthal 2010). From what I’ve seen, something similar appears to be present in the big Ta-Ne or slightly bigger Narrow Omotic (or North Omotic minus Dizoid) family, again with little else to show for Afroasiatic morphology.
What’s super significant here is that in both (all three? four?) Omotic families, the passive is marked by a glottalized consonant: implosive ɗ in Hamar, ejective t’ in Sheko, something similar in the rest (I think). First of all, this is a typically East Cushitic form of the passive/reflexive affix; I don’t think it occurs elsewhere, you just get reflexes of *t. And second, as we’ve just seen, there’s a beautiful East-Cushitic-internal way to derive the glottalized *d’ from older Afroasiatic *t.
So I’m inclined to see the Omotic derived verb suffixes as borrowings from East Cushitic, languages with which they have a long history of contact and that are spoken right next door. That means that the best morphological argument for counting anything Omotic as Afroasiatic can be attributed to contact.2 For the time being, Aari-Banna, Dizoid, and probably Narrow Omotic as well are ending up on my “Not Afroasiatic” list.




