来自know,知道，理解，-ledge,可能来自古英语名词后缀-lac,-lock,词源同wedlock.引申词义知识。

1. Father had no more than a superficial knowledge of music.

父亲对音乐只懂一点皮毛。

2. He did not get a chance to deepen his knowledge of Poland.

他没有机会更深入地了解波兰。

3. To the young boy his father was the fount of all knowledge.

对于这个小男孩儿来说，他的父亲就是所有知识的源泉。

4. George dazzled her with his knowledge of the world.

乔治的洞察世情令她叹服。

5. She was a woman with extraordinary vibrancy and extraordinary knowledge.

她是一位充满活力、博学多识的女子。