The word(s) "understand" appears 127 time(s) in 127 verse(s) in Quran in Abdullah Yusuf Ali translation.

(91) (Here is) a Book which We have sent down unto thee, full of blessings, that they may mediate on its Signs, and that men of understanding may receive admonition.

(92) And We gave him (back) his people, and doubled their number,- as a Grace from Ourselves, and a thing for commemoration, for all who have understanding.

(93) Is one who worships devoutly during the hour of the night prostrating himself or standing (in adoration), who takes heed of the Hereafter, and who places his hope in the Mercy of his Lord - (like one who does not)? Say: "Are those equal, those who know and those who do not know? It is those who are endued with understanding that receive admonition.

(94) Those who listen to the Word, and follow the best (meaning) in it: those are the ones whom Allah has guided, and those are the ones endued with understanding.

(95) Seest thou not that Allah sends down rain from the sky, and leads it through springs in the earth? Then He causes to grow, therewith, produce of various colours: then it withers; thou wilt see it grow yellow; then He makes it dry up and crumble away. Truly, in this, is a Message of remembrance to men of understanding.

(96) Now, when trouble touches man, he cries to Us: But when We bestow a favour upon him as from Ourselves, he says, "This has been given to me because of a certain knowledge (I have)!" Nay, but this is but a trial, but most of them understand not!

(97) A Guide and a Message to men of understanding.

(98) Assuredly the creation of the heavens and the earth is a greater (matter) than the creation of men: Yet most men understand not.

(99) A Book, whereof the verses are explained in detail;- a Qur'an in Arabic, for people who understand;-

(100) We have made it a Qur'an in Arabic, that ye may be able to understand (and learn wisdom).