vt.

1. 使变柔软
   I tried all kinds of ways to soften his heart, but all my efforts were in vain.

   我尝试各种方式去软化他的心，但我的努力都失败了。

2. 使变和蔼

vi.

1. 变柔和
2. 变弱

v.

1. make or become soft or softer.
2. (often soften someone/thing up) undermine the resistance of.