truth
The German word for truth is 'Wahrheit'. It is a noun and is used in a similar way to the English word 'truth'. It can refer to a fact that is true or to a belief that is held to be true. It can also be used in the sense of 'honesty' or 'sincerity'.
The truth can sometimes hurt.
This phrase implies that even though truth is always the moral way to go, it can sometimes lead to pain or upset because it may not always be what we want to hear or accept.
He always tells the truth.
This phrase describes a person who is always honest, never telling lies. It indicates the high moral standard of the person in question.
The truth lies somewhere in between.
This phrase is usually used to indicate that two sides of an argument have valid points and that the reality of the situation is likely not purely one side or the other, but rather a mix of both.