1 verse has
“improvise”
in Edition Clear Qur'an by Talal Itani / Al-A'raaf (The Heights)
7:203If you do not produce a miracle for them, they say, “Why don’t you improvise one.” Say, “I only follow what is inspired to me from my Lord.” These are insights from your Lord, and guidance, and mercy, for a people who believe.
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The Holy Quran · Al-Baqara (The Cow) · 2:274