Sooth (noun)

1. The truth or reality of a situation, fact, or statement.
2. Something that is true, genuine or real.

Origin:

The word "sooth" comes from old english sōð, of germanic origin; related to dutch zoet and german süß, from an indo-european root shared by latin suavis "pleasant", and means "truth, reality".

Examples:

1. He spoke only sooth and would not be swayed by flattery.
2. In sooth, the situation was far more dire than anyone had realized.
3. To speak sooth, the task is far more complicated than it appears.
4. It was not what was expected, but sooth must be told.
5. In sooth, she was the one who deserved the credit.