«خَوْفٍ» has a sākin wāw after fatḥah, which makes it a līn wāw. When pausing, final fāʾ becomes sākin after that līn letter, giving madd al-līn caused by the pause.
By contrast, «جُوعٍ» has madd wāw after ḍammah. Thus «جُو» is a long vowel while «خَو» is a glide. Recite the words separately and in their verse context so that connected and paused readings are not confused.
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Pausing on khawf: the līn ending
Al-Fīl and Quraysh: Applied Iẓhār, Ikhfāʾ, Idghām, Madd and Waqf
«خَوْفٍ» has a sākin wāw after fatḥah, which makes it a līn wāw. When pausing, final fāʾ becomes sākin after that līn letter, giving madd al-līn caused by the pause.
By contrast, «جُوعٍ» has madd wāw after ḍammah. Thus «جُو» is a long vowel while «خَو» is a glide. Recite the words separately and in their verse context so that connected and paused readings are not confused.