food
The German word 'Essen' is a noun that is used to refer to food in general. It is a very common word and can be used in a variety of contexts. For example, one might say 'Ich kaufe Essen' (I am buying food) or 'Das Essen ist lecker' (The food is delicious).
We need to order the food.
In this example, 'Essen' is used as a noun, meaning food. The verb 'bestellen' means to order. The phrase is used in the context of ordering food, perhaps in a restaurant.
I forgot my food.
In this phrase, 'Essen' is also used as a noun meaning food. The verb 'vergessen' translates to 'forgot'. This phrase could be used in a context of forgetting to bring food from home, or forgetting to eat.
The food smells good.
Here, 'Essen' is again used as a noun with the meaning of food. The phrase 'riecht gut' translates directly to 'smells good'. This phrase could be used when talking about a food dish that has a pleasant aroma.