vt.

1. 加強，增強；使變激烈
   His absence only intensified her longing.

   他不在身邊唯使她愈益渴念。

2. 【攝】加強（明暗度），強化（潛影）

vi.

1. 增強，強化；變激烈
   The war intensified.

   戰爭變得激烈了。

v.

1. make or become more intense.
2. Photography  increase the opacity of (a negative) using a chemical.