Chou Collection, Middle Volume. Radical: Earth (tǔ). Kangxi brush strokes: 17. Page 241, Entry 07.
Pronounced he. Refers to ditches, gullies, pits, valleys, or emptiness. Book of Odes (Shijing): To build up city walls and dig moats. Zhang Heng, Western Capital Rhapsody (Xijing fu): Mountain streams and valleys interweave and swirl.
It is also used to refer to the sea as the Great Gully, also called the Giant Gully. Zhuangzi, Heaven and Earth chapter: The Great Gully is something that will not fill up no matter how much is poured into it, and will not run dry no matter how much is scooped out of it.
Also, Classic of Mountains and Seas (Shanhai jing): There is a Mount He. Also: In the moving sands of the Western Sea, there is a country named Heshi.
Also, according to Jiyun, pronounced huo. Pronounced he. The meaning is the same. It is commonly written in a variant form, but this is incorrect.