bone
The German word for bone is 'Knochen'. It is a masculine noun and is used to refer to the hard, calcified structures that form the skeleton of vertebrate animals. 'Knochen' can also be used in a metaphorical sense to refer to something that is very hard or difficult, such as a 'hard nut to crack' (ein harter Knochen zu knacken).
The dog chews a bone.
This sentence demonstrates the most common use of the word 'Knochen' as a noun in a sentence. The 'Knochen' is the object of the verb 'kaut', which means 'chews'.
I have broken a bone.
In this example, the word 'Knochen' is used as the object of the verb 'gebrochen', which means 'broken'. This sentence is in the perfect tense, which is used to describe past events.
The bone pattern is interesting.
Here, 'Knochen' forms the compound noun 'Knochenmuster' with 'muster', which means 'pattern'. This is a common way to create new words in German.