truth
/truːθ/ noun (plural truths /truːðz/)
the truth › the real facts about a situation: Do you think he was telling the truth? I don't think we'll ever know the truth about what really happened.
BEING TRUE [U] › the quality of being true: There may be some truth in their claim. TRUE FACT [C] › a fact or idea that people accept is true: moral/religious truths → Opposite untruth