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
Now when thou seest them, their outward appearance may please thee; and when they speak, thou art inclined to lend ear to what they say.* [But though they may seem as sure of themselves] as if they were timbers [firmly] propped up, they think that every shout is [directed] against them. They are the [real] enemies [of all faith], so beware of them. [They deserve the imprecation,] "May God destroy them!"* How perverted are their minds!*