سَمِعَ — يَسْمَعُ
He heard — he hears.
Replace the initial يَ with مَ. The second radical mīm already bears fatḥah, so no change to that vowel is needed. With final tanwīn:
يَسْمَعُ ← مَسْمَعٌ
Across the three source models, ḍammah changes to fatḥah, kasrah remains kasrah, and fatḥah remains fatḥah.
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Deriving مَسْمَعٌ from يَسْمَعُ
Ism al-Ẓarf: Meaning, Patterns, Paradigm and Derivation
سَمِعَ — يَسْمَعُ
He heard — he hears.
Replace the initial يَ with مَ. The second radical mīm already bears fatḥah, so no change to that vowel is needed. With final tanwīn:
يَسْمَعُ ← مَسْمَعٌ
Across the three source models, ḍammah changes to fatḥah, kasrah remains kasrah, and fatḥah remains fatḥah.