If you describe a man as lecherous, you disapprove of him because he behaves towards women in a way which shows he is only interested in them sexually.
例句
...lecherous old men offering sweets at the school gate.在学校门口分发糖果的老色鬼们
英汉词典释义
adj.
好色的;淫荡的
a lecherous gleam in his eye他眼中闪现一丝欲火a lecherous good-for-nothing好色又无用的人
英英词典释义
Adjective
1. given to excessive indulgence in sexual activity;
"a lecherous gleam in his eye""a lecherous good-for-nothing"