ground
The German word for 'ground' is 'Boden'. It is a noun and is used to refer to the solid surface of the earth. It can also be used to refer to the floor or the bottom of something. In a more abstract sense, it can refer to the basis or foundation of something.
I dropped something on the floor.
This phrase refers to an action where the speaker accidentally dropped something onto the floor, with 'Boden' referring to the floor.
The floor is very slippery.
This phrase describes a situation where the floor surface, 'Boden' in German, is slippery, implying a warning or noting an observation.
She looked down and found a five-penny piece on the floor.
This sentence narrates an event where a person spotted a coin on the floor as she looked downwards, with the word 'Boden' used to denote the floor.