Wordnet 3.0
VERB (1)
1. 
 fight against or resist strongly; 
- Example: "The senator said he would oppose the bill"- Example: "Don't fight it!"[syn: fight, oppose, fight back, fight down, defend]
WordNet (r) 3.0 (2006):
fight down
    v 1: fight against or resist strongly; "The senator said he
         would oppose the bill"; "Don't fight it!" [syn: fight,
         oppose, fight back, fight down, defend]