The word(s) "understand" appears 46 time(s) in 46 verse(s) in Quran in Muhammad Pickthal translation.

(31) He said: Lord of the East and the West and all that is between them, if ye did but understand.

(32) And of His signs is this: He showeth you the lightning for a fear and for a hope, and sendeth down water from the sky, and thereby quickeneth the earth after her death. Lo! herein indeed are portents for folk who understand.

(33) (This is) a Scripture that We have revealed unto thee, full of blessing, that they may ponder its revelations, and that men of understanding may reflect.

(34) And We bestowed on him (again) his household and therewith the like thereof, a mercy from Us, and a memorial for men of understanding.

(35) Is he who payeth adoration in the watches of the night, prostrate and standing, bewaring of the Hereafter and hoping for the mercy of his Lord, (to be accounted equal with a disbeliever)? Say (unto them, O Muhammad): Are those who know equal with those who know not? But only men of understanding will pay heed.

(36) Who hear advice and follow the best thereof. Such are those whom Allah guideth, and such are men of understanding.

(37) Hast thou not seen how Allah hath sent down water from the sky and hath caused it to penetrate the earth as watersprings, and afterward thereby produceth crops of divers hues; and afterward they wither and thou seest them turn yellow; then He maketh them chaff. Lo! herein verily is a reminder for men of understanding.

(38) A guide and a reminder for men of understanding.

(39) He it is Who created you from dust, then from a drop (of seed) then from a clot, then bringeth you forth as a child, then (ordaineth) that ye attain full strength and afterward that ye become old men - though some among you die before - and that ye reach an appointed term, that haply ye may understand.

(40) And if We had appointed it a Lecture in a foreign tongue they would assuredly have said: If only its verses were expounded (so that we might understand)? What! A foreign tongue and an Arab? - Say unto them (O Muhammad): For those who believe it is a guidance and a healing; and as for those who disbelieve, there is a deafness in their ears, and it is blindness for them. Such are called to from afar.