Stem مَّثَانِى has 2 unique word forms and appears 2 times in the Quran.

Word Translation Occurrences
ٱلۡمَثَانِي <span class='n'>the</span> <span class='n'>oft-repeated</span>, the oft-repeated 2
مَّثَانِيَ oft-repeated, <span class='n'>oft-repeated</span> 2