The Low Vowel Insertion Rule After Gutturals (AKA The <i>Gahawa</i> -Syndrome): Types, Synchronic Distribution, Diachronic Developments and The Rule's Role in Bedouin-Type Arabic

Abstract The low vowel insertion rule (gahawa-syndrome) represents a distinct phonotactic process that alters the syllable structure by inserting an epenthetic short /a/ vowel in syllables where a guttural consonant serves as the coda. This insertion splits an originally closed syllable into two open syllables—i.e. CaG &amp;gt; CaGa. This article offers a detailed classification of the gahawa-syndrome, including its various types and subtypes, alongside a thorough inventory of morphological patterns susceptible to this rule. It also presents an overview of the rule's geographical distribution across the Arabic-speaking world and explores the possible origin of this phenomenon. The paper goes on to argue that /a/ insertion in the pattern CaCC# (i.e. CaCaC#) qualifies as a subtype of the gahawa-syndrome only under specific conditions. Additionally, a tentative reconstruction of its geographical emergence and historical development is provided. The article concludes that the gahawa-syndrome is justifiably labelled a ‘Bedouin-type-only’ feature.