تَقَبَّلَ — he accepted; tafaʿʿul.
تَقَابَلَ — he met face to face; tafāʿul.
Both derive from q-b-l and begin with formative tāʾ. Yet تَقَبَّلَ doubles bāʾ, whereas تَقَابَلَ inserts alif after qāf.
Their verbal nouns also differ:
تَقَبُّل — accepting.
تَقَابُل — meeting face to face.
The shared root therefore produces two different patterns and two related but distinct lexical meanings. Consonant inventory alone cannot explain the difference.
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Comparing تَقَبَّلَ and تَقَابَلَ
Five Augmented Triliteral Patterns Without Hamzat al-Wasl
تَقَبَّلَ — he accepted; tafaʿʿul.
تَقَابَلَ — he met face to face; tafāʿul.
Both derive from q-b-l and begin with formative tāʾ. Yet تَقَبَّلَ doubles bāʾ, whereas تَقَابَلَ inserts alif after qāf.
Their verbal nouns also differ:
تَقَبُّل — accepting.
تَقَابُل — meeting face to face.
The shared root therefore produces two different patterns and two related but distinct lexical meanings. Consonant inventory alone cannot explain the difference.