battle/ 'bætl /

1.noun [c] [军] 
战役

2.noun [fig] 
(struggle) 斗争

3.vi.
(fight) 交战

4.vi.
to battle for sth/to do sth (struggle) 力争某事/做某事

5.vi.
to battle (with sb) for sth/to do sth (compete) (与某人)争夺某物/争做某事

that's half the battle
那是成功的一半
it's a {or} we're fighting a losing battle
这/我们注定要失败
to do battle (with sb)
(与某人)交战
6.vi.
(compete) (与某人)争高下