Radicals are the consonants that establish a word's basic lexical root. In a three-radical verb, their positions are conventionally called fāʾ al-kalimah, ʿayn al-kalimah, and lām al-kalimah. These are labels for positions, not a claim that the root contains the literal letters ف، ع، ل.
ضَرَبَ: ض is first, ر second, and ب third.
وَعَدَ: و is first, ع second, and د third.
قَالَ contains a written alif, but its root is ق و ل, with wāw as the middle radical. Surface spelling alone therefore cannot settle the root.
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Roots and Radicals
The Seven Morphological Classes: Sound, Hamzated, Weak and Doubled
Radicals are the consonants that establish a word's basic lexical root. In a three-radical verb, their positions are conventionally called fāʾ al-kalimah, ʿayn al-kalimah, and lām al-kalimah. These are labels for positions, not a claim that the root contains the literal letters ف، ع، ل.
ضَرَبَ: ض is first, ر second, and ب third.
وَعَدَ: و is first, ع second, and د third.
قَالَ contains a written alif, but its root is ق و ل, with wāw as the middle radical. Surface spelling alone therefore cannot settle the root.