To finally concede, admit, or realize that s.t. is true (because of a lesson one has learned or because of undisputable proof that one has seen); to do s.t. that causes s.o. to finally concede, admit or realize the truth [ma--an].
Now admit that what I've been telling you is true. When it comes to a thief, for sure he will just end up in jail.
Those people weren't willing to concede concerning my ability until they tried me.
They wouldn't have stopped being doubtful if the Prophet Moses hadn't done s.t. to cause them to finally admit the truth.