Unveiling the Morphological Acquisition and Development of Arabic Nominal Derivation in Early Childhood

This study investigates the developmental trajectory and order of acquisition of Arabic-derived nominal forms—specifically agentive, instrumental, and locative nouns—among 54 Saudi Arabic-speaking children aged 4 to 10 years. Using a sentence completion task, children were prompted to derive novel noun forms from triliteral Form I Arabic verbs. Results revealed a clear developmental sequence in the acquisition of derivational morphology, with agentive nouns acquired first, followed by instrumental, and then locative nouns. Notably, the agentive pattern CaCCaC and the instrumental CaCCaCah were the most frequently produced, suggesting these serve as default templates for nominal derivation among young speakers. These patterns appear more accessible due to their high frequency, transparency, and productivity in spoken Arabic. Statistical analyses further confirmed that age significantly influenced performance, with older children demonstrating greater mastery and pattern distinction. The study highlights the cognitive and linguistic strategies employed by children in parsing Arabic’s root-and-pattern system and extending it to novel forms. Findings contribute to the understanding of morphological acquisition in Semitic languages and fill a gap in Arabic first language research, which has traditionally focused on inflectional rather than derivational morphology. This work provides theoretical insight, emphasizing the importance of exposure to frequent and semantically transparent patterns in early language development.