Word by Word Analysis

فَذَرْهُمْ يَخُوضُوا۟ وَيَلْعَبُوا۟ حَتَّىٰ يُلَـٰقُوا۟ يَوْمَهُمُ ٱلَّذِى يُوعَدُونَ 42

So leave them to converse vainly and amuse themselves until they meet their Day which they are promised -