In وَمَا أَدْرَاكَ, a madd alif ends the first word, and hamzat al-qaṭʿ begins the next. When connected, this is madd munfaṣil.
Contrast يُرَاءُونَ in al-Māʿūn: its madd alif and hamzah are within the same word, giving madd muttaṣil.
Stopping after wa-mā removes that inter-word hamzah relationship from the recitation. The physical word boundary is decisive.
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Wa-mā adrāka: a separate madd
Al-Māʿūn and Al-Humazah: Applied Assimilation, Concealment, Madd and Hāʾ Rules
In وَمَا أَدْرَاكَ, a madd alif ends the first word, and hamzat al-qaṭʿ begins the next. When connected, this is madd munfaṣil.
Contrast يُرَاءُونَ in al-Māʿūn: its madd alif and hamzah are within the same word, giving madd muttaṣil.
Stopping after wa-mā removes that inter-word hamzah relationship from the recitation. The physical word boundary is decisive.