51:44 after they had turned with disdain from their Sustainer's commandment - whereupon the thunderbolt of punishment overtook them while they were [helplessly] looking on:
Muhammad Asad (The Message Of Quran)
Dictionaries
Ejtaal Arabic Almanac: Lane's Lexicon, Hans Wehr, Lisan al-Arab and others
so that I might act righteously in whatever I have failed [aforetime]!''* Nay, it is indeed but a [meaningless] word that he utters: for behind those [who leave the world] there is a barrier [of death] until the Day when all will be raised from the dead!
AND HE it is who has given freedom of movement to the two great bodies of water * the one sweet and thirst-allaying, and the other salty and bitter - and yet has wrought between them a barrier and a forbidding ban.*