جَبُنْتُ جُبْنًا
Translation: I acted cowardly—an instance of cowardice.
جَبُنْتُ: past verb with first-person subject, root ج ب ن.
جُبْنًا: cognate verbal noun, an accusative absolute object.
Compare with qaʿadtu ... jubnan: the reconstructed verb is jabuna, not qaʿada, so the relationship of verbal noun to verb changes.
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Al-Mafʿūl Lahu: Expressing the Reason for an Action
جَبُنْتُ جُبْنًا
Translation: I acted cowardly—an instance of cowardice.
جَبُنْتُ: past verb with first-person subject, root ج ب ن.
جُبْنًا: cognate verbal noun, an accusative absolute object.
Compare with qaʿadtu ... jubnan: the reconstructed verb is jabuna, not qaʿada, so the relationship of verbal noun to verb changes.