The word(s) "lose" appears 75 time(s) in 72 verse(s) in Quran in Mohsin Khan translation.

(51) And the heart of the mother of Musa (Moses) became empty [from every thought, except the thought of Musa (Moses)]. She was very near to disclose his (case, i.e. the child is her son), had We not strengthened her heart (with Faith), so that she might remain as one of the believers.

(52) "Put your hand in your bosom, it will come forth white without a disease; and draw your hand close to your side to be free from the fear (which you suffered from the snake, and also your hand will return to its original state). These are two Burhans (signs, miracles, evidence, proofs) from your Lord to Fir'aun (Pharaoh) and his chiefs. Verily, they are the people who are Fasiqun (rebellious, disobedient to Allah).

(53) Say (to them O Muhammad صلى الله عليه وسلم): "Sufficient is Allah for a witness between me and you. He knows what is in the heavens and on earth." And those who believe in Batil (all false deities other than Allah), and disbelieve in Allah and (in His Oneness), it is they who are the losers.

(54) The Prophet is closer to the believers than their ownselves, and his wives are their (believers') mothers (as regards respect and marriage). And blood relations among each other have closer personal ties in the Decree of Allah (regarding inheritance) than (the brotherhood of) the believers and the Muhajirun (emigrants from Makkah), except that you do kindness to those brothers (when the Prophet صلى الله عليه وسلم joined them in brotherhood ties). This has been written in the (Allah's Book of Divine) Decrees - (Al-Lauh Al-Mahfuz)."

(55) Then he (agreed to) cast lots, and he was among the losers.

(56) So worship what you like besides Him. Say (O Muhammad صلى الله عليه وسلم): "The losers are those who will lose themselves and their families on the Day of Resurrection. Verily, that will be a manifest loss!"

(57) To Him belong the keys of the heavens and the earth. And those who disbelieve in the Ayat (proofs, evidence, verses, signs, revelations, etc.) of Allah, such are they who will be the losers.

(58) And indeed it has been revealed to you (O Muhammad صلى الله عليه وسلم), as it was to those (Allah's Messengers) before you: "If you join others in worship with Allah, (then) surely (all) your deeds will be in vain, and you will certainly be among the losers."

(59) And We have assigned for them (devils) intimate companions (in this world), who have made fair-seeming to them, what was before them (evil deeds which they were doing in the present worldly life and disbelief in the Reckoning and the Resurrection) and what was behind them (denial of the matters in the coming life of the Hereafter as regards punishment or reward). And the Word (i.e. the torment) is justified against them as it was justified against those who were among the previous generations of jinn and men that had passed away before them. Indeed they (all) were the losers.

(60) The good deed and the evil deed cannot be equal. Repel (the evil) with one which is better (i.e. Allah orders the faithful believers to be patient at the time of anger, and to excuse those who treat them badly) then verily he, between whom and you there was enmity, (will become) as though he was a close friend.