An example of conceal is hiding old love letters from a spouse.
He tried to conceal the truth about his health.
Yet she was always trying to conceal that passion.
Maybe he was trying to protect her, but more likely he was simply trying to conceal the problem.
Conceal nothing from me, I wish to know absolutely how things are.
His interest seemed to increase when she clutched the sheets to conceal her state of undress.
He could conceal his design up to the very last.