The word(s) "lost" appears 31 time(s) in 31 verse(s) in Quran in Mohsin Khan translation.

(21) They will say: "Glorified be You! It was not for us to take any Auliya' (Protectors, Helpers) besides You, but You gave them and their fathers comfort till they forgot the warning, and became a lost people (doomed to total loss).

(22) And they say: "When we are (dead and become) lost in the earth, shall we indeed be created anew?" Nay, but they deny the Meeting with their Lord!

(23) And indeed, We did try Sulaiman (Solomon) and We placed on his throne Jasad (a devil, so he lost his kingdom for a while) and he did return (to Allah with obedience and in repentance, and to his throne and kingdom by the Grace of Allah).

(24) And, indeed We have sent Messengers before you (O Muhammad صلى الله عليه وسلم): of some of them We have related to you their story. And of some We have not related to you their story, and it was not given to any Messenger that he should bring a sign except by the Leave of Allah. But, when comes the Commandment of Allah, the matter will be decided with truth, and the followers of falsehood will then be lost.

(25) Then their Faith (in Islamic Monotheism) could not avail them when they saw Our punishment. (Like) this has been the way of Allah in dealing with His slaves. And there the disbelievers lost utterly (when Our Torment covered them).

(26) And that thought of yours which you thought about your Lord, has brought you to destruction; and you have become (this Day) of those utterly lost!

(27) Man (the disbeliever) does not get tired of asking good (things from Allah); but if an evil touches him, then he gives up all hope and is lost in despair.

(28) So, when you meet (in fight - Jihad in Allah's Cause) those who disbelieve, smite (their) necks till when you have killed and wounded many of them, then bind a bond firmly (on them, i.e. take them as captives). Thereafter (is the time) either for generosity (i.e. free them without ransom), or ransom (according to what benefits Islam), until the war lays down its burden. Thus [you are ordered by Allah to continue in carrying out Jihad against the disbelievers till they embrace Islam and are saved from the punishment in the Hell-fire or at least come under your protection], but if it had been Allah's Will, He Himself could certainly have punished them (without you). But (He lets you fight) in order to test some of you with others. But those who are killed in the Way of Allah, He will never let their deeds be lost.

(29) (Saying): "We are indeed Mughramun (i.e. ruined or have lost the money without any profit, or are punished by the loss of all that we spend for cultivation)! (Tafsir Al-Qurtubi)

(30) For the beggar who asks, and for the unlucky who has lost his property and wealth, (and his means of living has been straitened).