StageFormWhy
Underlying rootو ق يweak first and third radicals
2m imperfectتَقِيinitial wāw already deleted
Jussiveلَمْ تَقِfinal yāʾ also deleted
Direct imperativeقِremove imperfect prefix ta-
قِ means “Protect!” Although neither weak radical remains visible, both belong to its root. A seemingly one-letter imperative can therefore come from a three-radical lexeme.
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Complete Paradigm of the Separated Doubly Weak Verb وَقَى يَقِي
StageFormWhy
Underlying rootو ق يweak first and third radicals
2m imperfectتَقِيinitial wāw already deleted
Jussiveلَمْ تَقِfinal yāʾ also deleted
Direct imperativeقِremove imperfect prefix ta-
قِ means “Protect!” Although neither weak radical remains visible, both belong to its root. A seemingly one-letter imperative can therefore come from a three-radical lexeme.