The meaning of rootless tree and sourceless water is a metaphor for things without foundation.

1. Water without a source and a tree without a root are water without a source, and a tree without roots is a metaphor for things without a foundation. From Zuo Qiuming's "Zuo Zhuan Zhaogong Ninth Year" of the Pre-Qin Dynasty: Just as clothes have crowns, wood and water have origins.

2. "Zuo Zhuan" is said to have been written by Zuo Qiuming. It was originally called "Zuo Shi Chun Qiu" and later renamed "Zuo Shi Zhuan" in Chun Qiu, or simply "Zuo Zhuan". It is a narrative in ancient China. The complete chronological history book is a representative of pre-Qin prose works, which marks the maturity of narrative prose in our country.

3. Later it was also known as "Chun Qiu Zuo Shi" and "Zuo Shi". It was only after the Han Dynasty that it was often called "Zuo Zhuan". Together with "Gongyang Zhuan" and "Gu Liang Zhuan", it is collectively known as the "Three Biography of the Spring and Autumn Period". According to old legend, it was written by Zuo Qiu Ming in the late Spring and Autumn Period to explain Confucius's Spring and Autumn Annals.

Idioms related to wordless:

1. Indisputable: There is nothing to argue with. It means there is no doubt about it.

2. Nothing to say: nothing to say, nothing to interrupt.

3. No more can be added: no more can be added. It means that the degree has reached its extreme.

4. No winter or summer: no matter winter or summer. It means that all four seasons of the year are uninterrupted.

5. Infinite winter and summer: no matter winter or summer. It means that all four seasons of the year are uninterrupted. There is no winter and no summer.

6. Helpless: No matter what, what to do. Zhi felt that there was no other way but this.

7. Unknown soldier: Soldier refers to a soldier in ancient times. An unknown soldier. A metaphor for a person without fame or status.