The word(s) "understood" appears 2 time(s) in 2 verse(s) in Quran in Muhammad Pickthal translation.

(1) Have ye any hope that they will be true to you when a party of them used to listen to the word of Allah, then used to change it, after they had understood it, knowingly?

(2) Those who were left behind rejoiced at sitting still behind the messenger of Allah, and were averse to striving with their wealth and their lives in Allah's way. And they said: Go not forth in the heat! Say: The fire of hell is more intense of heat, if they but understood.