ʾAsmāʾ al-fiʿl - The Arab Grammarians’ Views on Their Classification research-article Beata Sheyhatovitch Zeitschrift für arabische Linguistik, Jahrgang 2021 (2021), Ausgabe 73, Seite 71 - 101 ʾAsmāʾ al-fiʿl (lit. ‘verb's names’) are interjections conveying meanings characteristic to verbs. This article explores medieval grammarians’ views on ʾasmāʾ al-fiʿl, focusing on strategies used by the grammarians to accommodate these expressions in their theory of the parts of speech. I begin by discussing ʾasmāʾ al-fiʿl's problematic status in light of the grammarians' definitions of the parts of speech. I demonstrate, inter alia, that the criteria used to determine the categorical identity of ʾasmāʾ al-fiʿl are not necessarily those appearing in the accepted definitions of a noun and a verb. I then argue that the understanding of this categorical identity can be helped, at least in some cases, by elucidating the notions of ʿadl ‘transformation’ and naql ‘(semantic) transfer’.