جَوْرَبَة follows فَوْعَلَة, whereas سَرْوَلَة follows فَعْوَلَة. Both contain wāw, but not in the same template position.
جَوْرَبَة — putting on a sock.
سَرْوَلَة — putting on a lower garment.
The locations of the fāʾ and ʿayn placeholders clarify where the extra element falls. The mere presence of wāw does not make these two patterns equivalent.
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Where the added wāw occurs
Mulḥaq bi-Rubāʿī: Definition, Two Groups and Nine Patterns
جَوْرَبَة follows فَوْعَلَة, whereas سَرْوَلَة follows فَعْوَلَة. Both contain wāw, but not in the same template position.
جَوْرَبَة — putting on a sock.
سَرْوَلَة — putting on a lower garment.
The locations of the fāʾ and ʿayn placeholders clarify where the extra element falls. The mere presence of wāw does not make these two patterns equivalent.