n.

1. 牛肉[U]
   He loves beef steak.

   他愛吃牛排。

2. 食用牛[C]
3. （屠宰後的）牛體[C]
4. 肌肉；體重；膂力；努力[U]
   Work hard, put some beef into the design.

   努力吧！在這個設計上加把勁。

   Plenty of exercise will take some of the beef off you.

   多多運動可以給你減掉一些體重。

5. 【美】【俚】抱怨，牢騷[C]
   What's your beef this time?

   這次你的牢騷是什麼？

   My beef is that it took too much time.

   我的抱怨是太花時間了。

   He wouldn't listen to my beef against his subordinates.

   他不願聽我對他下屬所發的牢騷。

vi.

1. 【美】【俚】抱怨，發牢騷[（+about）]
   He is forever beefing about that.

   他沒完沒了地為那事抱怨。

2. 申訴，告發

vt.

1. 養（牛）
2. 【口】加強，增強；改進[（+up）]
   Security needs beefing up.

   保安措施需要強化。

n.

1. the flesh of a cow, bull, or ox, used as food.
   ▸

   (pl. beeves /biːvz/ )

   Farming  a cow, bull, or ox fattened for its meat.
2. informal flesh with well-developed muscle.
   ▸strength or power.
   ▸the substance of a matter.
3. (pl. beefs)
   informal a complaint or grievance.

v.

1. (beef something up) give something more substance or strength.
2. complain.