Despair of something يأس من الشيء

It indicates deliverance, because of His saying, the Exalted:

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 ٱلْحَـٰكِمِينَ

“So when they had despaired of him, they secluded themselves in private consultation. The eldest of them said, "Do you not know that your father has taken upon you an oath by Allāh and [that] before you failed in [your duty to] Joseph? So I will never leave [this] land until my father permits me or Allāh decides for me, and He is the best of judges.”

Quran 12:80 · Saheeh International

(Whoever sees) that he despaired of God's mercy is doing the deeds of the people of the Fire.