To cut off from sight
To prevent (something) from being known
To put or keep out of sight
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.
His interest seemed to increase when she clutched the sheets to conceal her state of undress.
Conceal nothing from me, I wish to know absolutely how things are.
He could conceal his design up to the very last.