Lemma اسْتَكْثَرْ has 3 unique word forms and appears 3 times in the Quran.

Word Translation Occurrences
تَسۡتَكۡثِرُ (to) acquire more 2
ٱسۡتَكۡثَرۡتُم you have (misled) many 2
لَٱسۡتَكۡثَرۡتُ surely I could have multiplied 2