• تَا۟يْـَٔسُوا۟
• ٱسْتَيْـَٔسَ
• ٱسْتَيْـَٔسُوا۟
• يَا۟يْـَٔسُ
• يَا۟يْـَٔسِ
• يَـُٔوس
• يَئِسَ
• يَئِسْنَ
• يَئِسُوا۟

Appears 11 times in the Quran.

1. 5:3 حُرِّمَتْ عَلَيْكُمُ ٱلْمَيْتَةُ وَٱلدَّمُ وَلَحْمُ ٱلْخِنزِيرِ وَمَآ أُهِلَّ لِغَيْرِ ٱللَّهِ بِهِۦ وَٱلْمُنْخَنِقَةُ وَٱلْمَوْقُوذَةُ وَٱلْمُتَرَدِّيَةُ وَٱلنَّطِيحَةُ وَمَآ أَكَلَ ٱلسَّبُعُ إِلَّا مَا ذَكَّيْتُمْ وَمَا ذُبِحَ عَلَى ٱلنُّصُبِ وَأَن تَسْتَقْسِمُوا۟ بِٱلْأَزْلَٰمِ ذَٰلِكُمْ فِسْقٌ ٱلْيَوْمَ يَئِسَ ٱلَّذِينَ كَفَرُوا۟ مِن دِينِكُمْ فَلَا تَخْشَوْهُمْ وَٱخْشَوْنِ ٱلْيَوْمَ أَكْمَلْتُ لَكُمْ دِينَكُمْ وَأَتْمَمْتُ عَلَيْكُمْ نِعْمَتِى وَرَضِيتُ لَكُمُ ٱلْإِسْلَٰمَ دِينًا فَمَنِ ٱضْطُرَّ فِى مَخْمَصَةٍ غَيْرَ مُتَجَانِفٍ لِّإِثْمٍ فَإِنَّ ٱللَّهَ غَفُورٌ رَّحِيمٌ

   Forbidden to you is that which dies of itself, and blood, and flesh of swine, and that on which any other name than that of Allah has been invoked, and the strangled (animal) and that beaten to death, and that killed by a fall and that killed by being smitten with the horn, and that which wild beasts have eaten, except what you slaughter, and what is sacrificed on stones set up (for idols) and that you divide by the arrows; that is a transgression. This day have those who disbelieve despaired of your religion, so fear them not, and fear Me. This day have I perfected for you your religion and completed My favor on you and chosen for you Islam as a religion; but whoever is compelled by hunger, not inclining willfully to sin, then surely Allah is Forgiving, Merciful.
   

2. 11:9 وَلَئِنْ أَذَقْنَا ٱلْإِنسَٰنَ مِنَّا رَحْمَةً ثُمَّ نَزَعْنَٰهَا مِنْهُ إِنَّهُۥ لَيَـُٔوسٌ كَفُورٌ

   And if We make man taste mercy from Us, then take it off from him, most surely he is despairing, ungrateful.
   

3. 12:80 فَلَمَّا ٱسْتَيْـَٔسُوا۟ مِنْهُ خَلَصُوا۟ نَجِيًّا قَالَ كَبِيرُهُمْ أَلَمْ تَعْلَمُوٓا۟ أَنَّ أَبَاكُمْ قَدْ أَخَذَ عَلَيْكُم مَّوْثِقًا مِّنَ ٱللَّهِ وَمِن قَبْلُ مَا فَرَّطتُمْ فِى يُوسُفَ فَلَنْ أَبْرَحَ ٱلْأَرْضَ حَتَّىٰ يَأْذَنَ لِىٓ أَبِىٓ أَوْ يَحْكُمَ ٱللَّهُ لِى وَهُوَ خَيْرُ ٱلْحَٰكِمِينَ

   Then when they despaired of him, they retired, conferring privately together. The eldest of them said: Do you not know that your father took from you a covenant in Allah's name, and how you fell short of your duty with respect to Yusuf before? Therefore I will by no means depart from this land until my father permits me or Allah decides for me, and He is the best of the judges:
   

4. 12:87 يَٰبَنِىَّ ٱذْهَبُوا۟ فَتَحَسَّسُوا۟ مِن يُوسُفَ وَأَخِيهِ وَلَا تَا۟يْـَٔسُوا۟ مِن رَّوْحِ ٱللَّهِ إِنَّهُۥ لَا يَا۟يْـَٔسُ مِن رَّوْحِ ٱللَّهِ إِلَّا ٱلْقَوْمُ ٱلْكَٰفِرُونَ

   O my sons! Go and inquire respecting Yusuf and his brother, and despair not of Allah's mercy; surely none despairs of Allah's mercy except the unbelieving people.
   

5. 12:110 حَتَّىٰٓ إِذَا ٱسْتَيْـَٔسَ ٱلرُّسُلُ وَظَنُّوٓا۟ أَنَّهُمْ قَدْ كُذِبُوا۟ جَآءَهُمْ نَصْرُنَا فَنُجِّىَ مَن نَّشَآءُ وَلَا يُرَدُّ بَأْسُنَا عَنِ ٱلْقَوْمِ ٱلْمُجْرِمِينَ

   Until when the messengers despaired and the people became sure that they were indeed told a lie, Our help came to them and whom We pleased was delivered; and Our punishment is not averted from the guilty people.
   

6. 13:31 وَلَوْ أَنَّ قُرْءَانًا سُيِّرَتْ بِهِ ٱلْجِبَالُ أَوْ قُطِّعَتْ بِهِ ٱلْأَرْضُ أَوْ كُلِّمَ بِهِ ٱلْمَوْتَىٰ بَل لِّلَّهِ ٱلْأَمْرُ جَمِيعًا أَفَلَمْ يَا۟يْـَٔسِ ٱلَّذِينَ ءَامَنُوٓا۟ أَن لَّوْ يَشَآءُ ٱللَّهُ لَهَدَى ٱلنَّاسَ جَمِيعًا وَلَا يَزَالُ ٱلَّذِينَ كَفَرُوا۟ تُصِيبُهُم بِمَا صَنَعُوا۟ قَارِعَةٌ أَوْ تَحُلُّ قَرِيبًا مِّن دَارِهِمْ حَتَّىٰ يَأْتِىَ وَعْدُ ٱللَّهِ إِنَّ ٱللَّهَ لَا يُخْلِفُ ٱلْمِيعَادَ

   And even if there were a Quran with which the mountains were made to pass away, or the earth were travelled over with it, or the dead were made to speak thereby; nay! the commandment is wholly Allah's, Have not yet those who believe known that if Allah please He would certainly guide all the people? And (as for) those who disbelieve, there will not cease to afflict them because of what they do a repelling calamity, or it will alight close by their abodes, until the promise of Allah comes about; surely Allah will not fail in (His) promise.
   

7. 17:83 وَإِذَآ أَنْعَمْنَا عَلَى ٱلْإِنسَٰنِ أَعْرَضَ وَنَـَٔا بِجَانِبِهِۦ وَإِذَا مَسَّهُ ٱلشَّرُّ كَانَ يَـُٔوسًا

   And when We bestow favor on man, he turns aside and behaves proudly, and when evil afflicts him, he is despairing.
   

8. 29:23 وَٱلَّذِينَ كَفَرُوا۟ بِـَٔايَٰتِ ٱللَّهِ وَلِقَآئِهِۦٓ أُو۟لَٰٓئِكَ يَئِسُوا۟ مِن رَّحْمَتِى وَأُو۟لَٰٓئِكَ لَهُمْ عَذَابٌ أَلِيمٌ

   And (as to) those who disbelieve in the communications of Allah and His meeting, they have despaired of My mercy, and these it is that shall have a painful punishment.
   

9. 41:49 لَّا يَسْـَٔمُ ٱلْإِنسَٰنُ مِن دُعَآءِ ٱلْخَيْرِ وَإِن مَّسَّهُ ٱلشَّرُّ فَيَـُٔوسٌ قَنُوطٌ

   Man is never tired of praying for good, and if evil touch him, then he is despairing, hopeless.
   

10. 60:13 يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ لَا تَتَوَلَّوْا۟ قَوْمًا غَضِبَ ٱللَّهُ عَلَيْهِمْ قَدْ يَئِسُوا۟ مِنَ ٱلْءَاخِرَةِ كَمَا يَئِسَ ٱلْكُفَّارُ مِنْ أَصْحَٰبِ ٱلْقُبُورِ

    O you who believe! do not make friends with a people with whom Allah is wroth; indeed they despair of the hereafter as the unbelievers despair of those in tombs.
    

11. 65:4 وَٱلَّٰٓـِٔى يَئِسْنَ مِنَ ٱلْمَحِيضِ مِن نِّسَآئِكُمْ إِنِ ٱرْتَبْتُمْ فَعِدَّتُهُنَّ ثَلَٰثَةُ أَشْهُرٍ وَٱلَّٰٓـِٔى لَمْ يَحِضْنَ وَأُو۟لَٰتُ ٱلْأَحْمَالِ أَجَلُهُنَّ أَن يَضَعْنَ حَمْلَهُنَّ وَمَن يَتَّقِ ٱللَّهَ يَجْعَل لَّهُۥ مِنْ أَمْرِهِۦ يُسْرًا

    And (as for) those of your women who have despaired of menstruation, if you have a doubt, their prescribed time shall be three months, and of those too who have not had their courses; and (as for) the pregnant women, their prescribed time is that they lay down their burden; and whoever is careful of (his duty to) Allah He will make easy for him his affair.