These three forms look similar, but their explanations differ.
Word / formMeaning / explanation
قُلْتُق و ل: wāw elides, with ḍammah on qāf, Rule 2.
بِعْتُب ي ع: yāʾ elides, with kasrah on bāʾ, Rule 3.
خِفْتُخ و ف: wāw elides but khāʾ takes kasrah because its underlying perfect has a kasrah-bearing middle radical, Rule 4.
Saying only “the alif disappeared” misses the distinction between radical identity and the perfect's original vowel.
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Hollow Verbs: Seven Iʿlāl Rules and Three Short Paradigms
These three forms look similar, but their explanations differ.
Word / formMeaning / explanation
قُلْتُق و ل: wāw elides, with ḍammah on qāf, Rule 2.
بِعْتُب ي ع: yāʾ elides, with kasrah on bāʾ, Rule 3.
خِفْتُخ و ف: wāw elides but khāʾ takes kasrah because its underlying perfect has a kasrah-bearing middle radical, Rule 4.
Saying only “the alif disappeared” misses the distinction between radical identity and the perfect's original vowel.