chumminess 

英汉解释

n. 亲密无间；友好

同义词

n. camaraderie，comradeliness，comradery，comradeship

参考例句

1. Ma's chumminess with Beijing has been attacked by the opposition DPP, which, as part of its pro-independence platform, is wary of any moves to draw close to China.
马英九与北京的亲密关系一直遭到反对党民进党的攻击，因其台湾作为独立平台的主张之一，就是采取任何接近中国的行动都应谨慎。

英英解释

n.
  1. the quality of affording easy familiarity and sociability

网络释义

chumminess
密友;