a.

1. 友好的，親切的[（+to/towards）]
   He's not very friendly towards newcomers.

   他對新來的人不太友好。

2. 朋友關係的[F][（+with）]
   He got friendly with a young engineer.

   他與一位年輕的工程師交上了朋友。

3. 支持的，贊成的[F][（+to）]
   This company has never been friendly to change.

   這家公司從來不贊成變化。

4. 便利的；合適的
   a friendly wind

   順風

adj.

1. kind and pleasant; of or like a friend.
2. [in combination] not harmful to a specified thing:
   an environment-friendly policy.
3. Military  of, belonging to, or allied with one's own forces.
4. favourable or serviceable.

n.