Stem أَنسَىٰ has 3 unique word forms and appears 4 times in the Quran.

Word Translation Occurrences
فَأَنسَىٰهُمۡ so he made them forget 4
أَنسَىٰنِيهُ made me forget it 2
فَأَنسَىٰهُ But made him forget 2