29:51 Is it not enough for them that We have sent down to you the Book that is being recited to them? In that is a mercy and a reminder for people who believe.
The Monotheist Group (The Quran: A Monotheist Translation)
Dictionaries
Ejtaal Arabic Almanac: Lane's Lexicon, Hans Wehr, Lisan al-Arab and others
Now had We so willed, We could have shown them clearly to thee, so that thou wouldst know them for sure as by a visible mark:* but [even so,] thou wilt most certainly recognize them by the tone of their voice.* And God knows all that you do, [O men;]