hard

• 艰难困苦

  difficulties and hardships

• 艰难曲折

  difficulties and complications

• 艰难险阻

  difficulties and obstacles

• 艰难的道路

  hard road

• 艰难的岁月

  difficult age

• 行动艰难。

  It is difficult to take action.

• 不畏艰难

  take the bull by the horns

• 这一斗争将是艰难的。

  This struggle will be hard.