源泉 (yuánquán): fountainhead; source; wellspring

Measure Word

一个源泉 gè

Zhīshi shì lìliàng de yuánquán.

Knowledge is the source of strength.

Jiātíng shì tā xìngfú de yuánquán.

Family is the source of his happiness.

memory

源 (source) + 泉 (spring/fountain) — a spring that is the source, i.e. the original wellspring of something.

源 yuán

泉 quán