Subsoil (noun)

The layer of soil or rock located beneath the topsoil and above the bedrock.

Origin:

Derived from the latin word "subsolum", meaning "below the soil".

Examples:

1. The subsoil is usually composed of clay and minerals.
2. The subsoil affects the type of plants that can grow in a particular area.
3. The subsoil layer helps to retain moisture in the soil.
4. The subsoil composition is important for determining the suitability of land for agriculture.
5. The subsoil characteristics play a crucial role in soil stability and erosion control.