trench

A trench is a long and narrow ditch or hole, often used for military purposes. It can also refer to a deep and narrow groove or furrow.

You might hear about trenches when learning about wars or battles. For example, during World War I, soldiers dug extensive networks of trenches in the ground as protection from enemy fire. In fact, trenches are still used today by some militaries for training exercises or defensive positions. But the word "trench" isn't just limited to military contexts. It can also describe a deep groove or furrow in the ground, like a trench on a highway where water tends to collect during heavy rain. Additionally, if you work with clay or mud, you might use a type of tool called a trenching spade to create these narrow channels for drainage or other purposes.