“Despairing from Allah’s Help or forgiveness”

Ch 39 V53: Say, “O My servants who have transgressed against themselves [by sinning], do not despair of the mercy of Allah . Indeed, Allah forgives all sins. Indeed, it is He who is the Forgiving, the Merciful.”
Meaning:-
Transgress: violation of a law, misbehave, wrongdoing, misdeed, sin.
Despair: the complete loss or absence of hope.