a.

1. 坚韧的，牢固的，折不断的
   This material is as tough as leather.

   这料子像皮革般坚韧。

2. （肉等）老的，咬不动的
   The steak was so tough I couldn't eat it.

   牛排太老了，我咬不动它。

3. 强壮的，结实的
   Donkeys are tough little animals and can carry big loads.

   驴是结实的小动物，能负重载。

4. 顽固的，固执的
   He is a tough nut.

   他是一个顽固的家伙。

5. 不屈不挠的，刚强的
   He is a very tough man.

   他是个硬汉。

6. 粗鲁的；不守秩序的，无法无天的
   He lives in a tough neighborhood.

   他住的地区邻里非常粗野。

7. 【口】不幸的，倒霉的[（+on）]
   A spell of tough luck discouraged us.

   一阵坏运气令我们大为沮丧。

8. 棘手的，费劲的
   That was tough work.

   那是棘手的工作。

9. 强硬的；严格的；冷酷的[（+with/on）]
   The law is tough on offenders.

   该法律对违法者处罚很严厉。

n.

1. 【美】粗暴的人；暴徒，恶棍[C]
   A gang of toughs attacked the police.

   一群暴徒袭击了警察。

adj.

1. strong enough to withstand wear and tear.
   ▸(of food, especially meat) difficult to cut or chew.
2. able to endure hardship, adversity, or pain.
   ▸involving considerable difficulty or hardship.
3. strict and uncompromising.
4. rough or violent.
5. used to express a lack of sympathy:
   if you don't like it, tough.

n.