Rule 1: A quiescent radical wāw drops when it falls between an open (fatḥah-bearing) imperfect prefix and a kasrah-bearing middle radical.
يَوْعِدُ → يَعِدُ — he promises.
Here ya- is the imperfect prefix, wْ is the first radical, and ʿi is the middle radical with kasrah. The prescribed form avoids the awkward phonetic sequence.
This is a rule for a defined environment, not a command to drop every wāw in a verb.
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Rule 1: Wāw Elision in the Imperfect
Weak-Initial Roots: Elision, Substitution, Assimilation and Short Paradigms
Rule 1: A quiescent radical wāw drops when it falls between an open (fatḥah-bearing) imperfect prefix and a kasrah-bearing middle radical.
يَوْعِدُ → يَعِدُ — he promises.
Here ya- is the imperfect prefix, wْ is the first radical, and ʿi is the middle radical with kasrah. The prescribed form avoids the awkward phonetic sequence.
This is a rule for a defined environment, not a command to drop every wāw in a verb.