A mithāl root has a weak first radical (fāʾ al-kalimah), usually wāw or yāʾ.
وَعَدَ — “he promised,” from و ع د, with wāw at the beginning.
يَسَرَ — an example with original yāʾ in the first position.
In the common paradigm وَعَدَ → يَعِدُ, the initial wāw is omitted in the imperfect. That change illustrates why a root's weak position matters for conjugation, rather than being a label to memorize in isolation.
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Mithāl: Weak First Radical
The Seven Morphological Classes: Sound, Hamzated, Weak and Doubled
A mithāl root has a weak first radical (fāʾ al-kalimah), usually wāw or yāʾ.
وَعَدَ — “he promised,” from و ع د, with wāw at the beginning.
يَسَرَ — an example with original yāʾ in the first position.
In the common paradigm وَعَدَ → يَعِدُ, the initial wāw is omitted in the imperfect. That change illustrates why a root's weak position matters for conjugation, rather than being a label to memorize in isolation.