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

(111) And We have indeed made the Qur'an easy to understand and remember: then is there any that will receive admonition?

(112) But We have indeed made the Qur'an easy to understand and remember: then is there any that will receive admonition?

(113) And We have indeed made the Qur'an easy to understand and remember: then is there any that will receive admonition?

(114) And We have indeed made the Qur'an easy to understand and remember: then is there any that will receive admonition?

(115) Of a truth ye are stronger (than they) because of the terror in their hearts, (sent) by Allah. This is because they are men devoid of understanding.

(116) The similitude of those who were charged with the (obligations of the) Mosaic Law, but who subsequently failed in those (obligations), is that of a donkey which carries huge tomes (but understands them not). Evil is the similitude of people who falsify the Signs of Allah: and Allah guides not people who do wrong.

(117) That is because they believed, then they rejected Faith: So a seal was set on their hearts: therefore they understand not.

(118) They are the ones who say, "Spend nothing on those who are with Allah's Messenger, to the end that they may disperse (and quit Medina)." But to Allah belong the treasures of the heavens and the earth; but the Hypocrites understand not.

(119) Allah has prepared for them a severe Punishment (in the Hereafter). Therefore fear Allah, O ye men of understanding - who have believed!- for Allah hath indeed sent down to you a Message,-

(120) Should He not know,- He that created? and He is the One that understands the finest mysteries (and) is well-acquainted (with them).