如火如荼

rúhuǒrútú
  1. like wildfire (idiom)
  2. unstoppable

CEDICT

  1. (to have) a mighty army like wildfire
  2. a daunting and vigorous momentum; flourishing; magnificent
  3. a mighty army like wildfire

Wiktionary

比喻軍容壯盛浩大。參見「如荼如火」條。《二十年目睹之怪現狀．第五八回》：「如火如荼，軍容何盛。」後亦形容氣勢或氣氛等的蓬勃、熱烈。《老殘遊記．第一一回》：「鉤連上些人家的敗類子弟，一發做得如火如荼。」

重編國語辭典

  1. 事物的興盛或氣氛的熱烈
  2. 軍容壯盛浩大

維基詞典

Entry Composition

1 如火 rúhuǒ fiery
2 如 rú
  1. as
  2. as if
  3. such as
3 荼 tú
  1. thistle
  2. common sowthistle (Sonchus oleraceus)
  3. bitter (taste)
  4. cruel
  5. flowering grass in profusion

Related entries

銳不可當 ruìbùkědāng
  1. unstoppable
  2. hard to hold back
不衰 bùshuāi
  1. unfailing
  2. never weakening
  3. enduring
  4. unstoppable