khó nuốt

• Hard to eat
  • Cơm khô khó nuốt: Dry rice is hard to eat.
• (thông tục) Hard to dọ
  • Bài thi sinh vật khó nuốt lắm: The biology paperis very hard to do, the biology paper is stinker
  • Bài toán khó nuốt: A hard mathematics problem, a mathematics problem with is a hard nut to crack