势不可当

Explanation: When: resist. Fast and violent, irresistible. 　　Usage: The main predicate; as predicate, attributive; with a compliment 　　Source: "Jin Shu Xi Kam Chuen": "group inverse Zongyi, its irresistible, you can count bend, it is difficult competing forces." 　　Examples: Ming Luo Guanzhong's "Romance of Three Kingdoms" 73 back: "Ma Chaoshi soldier, has sharp course of time, this swaggering, ~." 　　Riddle: Mo can also Royal Thesaurus:  carry all before one, to retire when one has ridden the crest of success, riptide to withdraw or retire courageously, duly off the hook, comings and goings => coming. get out, go, leave, etc while the ,going is `good leave a place or stop doing sth while conditions are still favourable or while it is still easy to do so