大敌当前

大敵當前
dàdídāngqián
(idiom) to be faced with a formidable enemy

CEDICT

to be confronted with a formidable enemy

Wiktionary

面临着强大的敌人。形容形势严重，压力强大。

重編國語辭典

Entry Composition

1 大敌 dàdí formidable enemy; archenemy
2 当前 dāngqián
  1. the present time
  2. to be faced with