1.ally用作动词的基本意思是通过协议或条约的形式“(使)结盟,(使)联合”,引申可表示“联姻”。
2.ally既可用作及物动词,常与with或to连用; 也可用作不及物动词,常与with或against连用。

用作不及物动词
▲S+～(+A)
This country allied with another country.这个国家与另一国家结盟。
The two children allied against her.这两个孩子联合起来反对她。
用作及物动词
▲S+～+pron./n.(+with〔to〕 n./pron.)
Common interests allied this country with many others during the war.在大战中共同的利益使该国与许多国家结盟。
She has allied herself to the West to attain certain economic aspirations.她和欧美国家联合以达到一定的经济目的。
He allied himself to a rich family.他和富家联姻。
◇ 用于be ～ed结构
The bank is allied with several others.该银行与另几家都有业务联系。
The increase in violent crimes is allied to the rise in unemployment.暴力犯罪的增加与失业的增加有关。

ally, alleviate, assuage, lighten, mitigate, relieve
参见relieve条。

In that war England was not an ally; she was neutral.在那场战争中,英国不同任何一国结盟,保持中立。
He is one of the Prime Minister's closest allies.他是总理最亲密的盟友之一。
She felt she needed an ally so badly.她感到她急需一个支持者。

ally, accomplice, associate, colleague, co-worker, partner
参见accomplice条。

［同义词］ v.  combine, connect, join, unify, unite n.  associate, friend, partner
［反义词］ n.  adversary, enemy
［词源］＜中古英语alien(使结合在一起)