Three pieces of information belong in a morphological analysis: root, derived form and conjugation position. For example, أَقِمْ has root ق و م, belongs to Form IV, and is a second-person masculine singular imperative. اِخْتَرْ has root خ ي ر, belongs to Form VIII, and has the same person/number/imperative function.
Both are hollow imperatives, but Form IV adds initial hamzat al-qaṭʿ and Form VIII contains an infixed tāʾ. A sound analysis captures both these commonalities and differences rather than matching surface letters alone.
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Putting Root, Pattern and Inflection Together
Derived Hollow Wāw and Yāʾ Verbs: Short Paradigms and Morphological Reasoning
Three pieces of information belong in a morphological analysis: root, derived form and conjugation position. For example, أَقِمْ has root ق و م, belongs to Form IV, and is a second-person masculine singular imperative. اِخْتَرْ has root خ ي ر, belongs to Form VIII, and has the same person/number/imperative function.
Both are hollow imperatives, but Form IV adds initial hamzat al-qaṭʿ and Form VIII contains an infixed tāʾ. A sound analysis captures both these commonalities and differences rather than matching surface letters alone.