rival / enemy

rival
rival (to someone/something) (for something)

a person, company, or thing that competes with another in sports, business, etc.

The two teams have always been rivals.

This latest design has no rival/rivals (= it is easily the best design available).


http://oaadonline.oxfordlearnersdictionaries.com/dictionary/rival

1. 
   
   競爭者, 對手, 敵手
   They are rivals for the same office.   他們是爭奪同一個職位的敵手。


2. 
   
   匹敵者, 可與之相比的人(或物)
   His collection of stamps has few rivals in the world. 他搜集的郵票幾乎舉世無雙。
   
   

http://tw.dictionary.search.yahoo.com/search?p=rival&fr=yfp&ei=utf-8&v=0



                                                                                                                       


 enemy
 a person who hates someone or who acts or speaks against someone or something
He has a lot of enemies in the company.


 the enemy [singular] a country that you are fighting a war against; the soldiers, etc. of this country


 enemy (of something)

(formal) anything that harms something or prevents it from being successful
Poverty and ignorance are the enemies of progress.


http://oaadonline.oxfordlearnersdictionaries.com/dictionary/enemy

1. 
   
   敵人, 仇敵[C]
   
   
   Don't make an enemy of him.   不要與他為敵。


2. 
   
   敵軍[the S][G]
   
   
   The enemy was/were attacking the town.   敵軍正在攻打該城。
   
   
   The enemy gave up without resistance.   敵軍沒有抵抗就投降了。


3. 
   
   敵艦; 敵國; 敵機[C]
   
   
   The enemy was shot down by our anti-aircraft fire. 敵機被我方的高射砲火擊落。


4. 
   
   大敵; 大害; 危害物[S1]
   
   
   Frost is an enemy of flowers. 霜凍是花卉的大敵。

http://tw.dictionary.search.yahoo.com/search;_ylt=A3eg.8k3N_xQhhgAuE19rolQ;_ylc=X1MDMTM1MTIwMDM4MQRfcgMyBGFvA2FvBGNzcmNwdmlkA19RWkVMbmVnLmlwengwMXNVUGx0YUEwTGJfWU9GVkQ4TjA0QUF3MGgEZnIDeWZwBGZyMgNzYnRuBG5fZ3BzAzEEb3JpZ2luA3NycARwcXN0cgNlbmVteQRxdWVyeQNlbmVteQRzYW8DMQ--?p=enemy&fr2=sb-top&fr=yfp&pqstr=enemy