The word(s) "lose" appears 47 time(s) in 44 verse(s) in Quran in Abdullah Yusuf Ali translation.

(11) And obey Allah and His Messenger; and fall into no disputes, lest ye lose heart and your power depart; and be patient and persevering: For Allah is with those who patiently persevere:

(12) The Hypocrites, men and women, (have an understanding) with each other: They enjoin evil, and forbid what is just, and are close with their hands. They have forgotten Allah; so He hath forgotten them. Verily the Hypocrites are rebellious and perverse.

(13) As in the case of those before you: they were mightier than you in power, and more flourishing in wealth and children. They had their enjoyment of their portion: and ye have of yours, as did those before you; and ye indulge in idle talk as they did. They!- their work are fruitless in this world and in the Hereafter, and they will lose (all spiritual good).

(14) (This will be) their cry therein: "Glory to Thee, O Allah!" And "Peace" will be their greeting therein! and the close of their cry will be: "Praise be to Allah, the Cherisher and Sustainer of the worlds!"

(15) Without a doubt, these are the very ones who will lose most in the Hereafter!

(16) If there were a Qur'an with which mountains were moved, or the earth were cloven asunder, or the dead were made to speak, (this would be the one!) But, truly, the command is with Allah in all things! Do not the Believers know, that, had Allah (so) willed, He could have guided all mankind (to the right)? But the Unbelievers,- never will disaster cease to seize them for their (ill) deeds, or to settle close to their homes, until the promise of Allah come to pass, for, verily, Allah will not fail in His promise.

(17) Of the bounties of thy Lord We bestow freely on all- These as well as those: The bounties of thy Lord are not closed (to anyone).

(18) Without adding, "So please Allah!" and call thy Lord to mind when thou forgettest, and say, "I hope that my Lord will guide me ever closer (even) than this to the right road."

(19) "So we desired that their Lord would give them in exchange (a son) better in purity (of conduct) and closer in affection.

(20) Say: "Shall we tell you of those who lose most in respect of their deeds?-