Look at the middle root letter.
Hamzat-ul-WaslVowel on the middle root letter
DhammahDhammah
KasrahKasrah
KasrahFathah
Shortcut: middle Dhammah → initial Dhammah; middle Kasrah or Fathah → initial Kasrah.
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How to Vowel Hamzat-ul-Wasl
The Imperative Verb (Fi'l Amr) - Concept & Construction
Look at the middle root letter.
Hamzat-ul-WaslVowel on the middle root letter
DhammahDhammah
KasrahKasrah
KasrahFathah
Shortcut: middle Dhammah → initial Dhammah; middle Kasrah or Fathah → initial Kasrah.