a.

1. 堅韌的，牢固的，折不斷的
   This material is as tough as leather.

   這料子像皮革般堅韌。

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

   牛排太老了，我咬不動它。

3. 強壯的，結實的
   Donkeys are tough little animals and can carry big loads.

   驢是結實的小動物，能負重載。

4. 頑固的，固執的
   He is a tough nut.

   他是一個頑固的傢伙。

5. 不屈不撓的，剛強的
   He is a very tough man.

   他是個硬漢。

6. 粗魯的；不守秩序的，無法無天的
   He lives in a tough neighborhood.

   他住的地區鄰里非常粗野。

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

   一陣壞運氣令我們大為沮喪。

8. 棘手的，費勁的
   That was tough work.

   那是棘手的工作。

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

   該法律對違法者處罰很嚴厲。

n.

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

   一群暴徒襲擊了警察。

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.