Abstract
The study addresses the investigation of morphological productivity in both Arabic and English. Morphological productivity refers to the ability of morphological rules to generate new words in a language. The study begins by defining the concept of morphological productivity and reviewing a number of previous studies related to word formation. It then proceeds to analyze the main mechanisms of word formation in both English and Arabic and also sheds light on several morphological processes, such as acronym, blending, borrowing, conversion, derivation, among others. Finally, the study provides a comparative analysis of word formation strategies in English and Arabic, emphasizing the similarities and differences in the productivity of morphological rules, reaffirming the importance of morphological productivity as an integral part of linguistic competence, and suggesting future directions for research in the field of contrastive studies on word formation.

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