Root ي ق ن(y q n) has 12 unique word forms and appears 28 times in the Quran.

English gloss Sure, Certain, Convinced, Absolute, Positive

Word Translation Occurrences
يُوقِنُونَ believe firmly, believe with certainty, certain, certain in faith, firmly believe, (who) firmly believe, they are certain, who are certain 22
ٱلۡيَقِينِ certain, (of) certainty 8
ٱلۡيَقِينُ the certainty 4
مُّوقِنِينَ certain, convinced 4
لِيَسۡتَيۡقِنَ that may be certain 2
بِمُسۡتَيۡقِنِينَ (are) convinced 2
مُوقِنُونَ (are now) certain 2
وَٱسۡتَيۡقَنَتۡهَآ though were convinced with them (signs) 2
يَقِينٍ certain 2
يَقِينَۢا certainly 2
لِّلۡمُوقِنِينَ for those who are certain 2
تُوقِنُونَ believe with certainty 2
ٱلۡمُوقِنِينَ the ones who are certain 2