Stem أَتْمَمْ has 3 unique word forms and appears 3 times in the Quran.

Word Translation Occurrences
أَتۡمَمۡتَ you complete 2
وَأَتۡمَمۡتُ and I have completed 2
وَأَتۡمَمۡنَٰهَا and We completed them 2