43:66 ARE THEY [who are lost in sin] but waiting for the Last Hour - [waiting] that it come upon them of a sudden, without their being aware [of its approach]?
Muhammad Asad (The Message Of Quran)
Dictionaries
Ejtaal Arabic Almanac: Lane's Lexicon, Hans Wehr, Lisan al-Arab and others
AND REMEMBER that brother of [the tribe of] Ad,* how - seeing that [other] warnings had already come and gone within his own knowledge as well as in times beyond his ken -* he warned his people [who lived] among those sand-dunes: Worship none but God! Verily, I fear lest suffering befall you on an awesome day!"