Definition: "In truth" is an adverbial phrase that means "in fact" or "actually." It is often used to emphasize that what follows is the real situation or a fact, sometimes contrasting with what might have been said before.
Simple Example: "In truth, I was not happy with the decision."
(This means that, honestly, the speaker was unhappy, even if they may not have shown it.)
More Complex Example: "Many people believe that success comes easily, but in truth, it requires a lot of hard work."
(Here, it emphasizes that the reality is different from the common belief.)
Use "in truth" when you want to emphasize the reality of a situation or correct a misunderstanding.