1. earth; soil; dirt; clay; mud
土が柔らかいせいだと信じたい。I want to believe it is because the soil is soft.
2. the earth (historically, esp. as opposed to the heavens); the ground; the land
3. low-quality torinoko-gami (containing mud)
4. (period of) refraining from construction in the direction of the god of the earth (in Onmyōdō)
also written as 犯土, 椎, 槌