'Understand' in the Bible

And I hear a voice of man between the banks of Ulai, and he calleth and saith: Gabriel, cause this one to understand the appearance.

And he cometh in near my station, and at his coming in I have been afraid, and I fall on my face, and he saith unto me: Understand, son of man, for at the time of the end is the vision.

at the commencement of thy supplications hath the word come forth, and I have come to declare it, for thou art greatly desired, and understand thou concerning the matter, and consider concerning the appearance.

And he saith unto me: Do not fear, Daniel, for from the first day that thou didst give thy heart to understand, and to humble thyself before thy God, thy words have been heard, and I have come because of thy words.

and I have come to cause thee to understand that which doth happen to thy people in the latter end of the days, for yet the vision is after days.

And I have heard, and I do not understand, and I say, 'O my lord, what is the latter end of these?'

Purify themselves, yea, make themselves white, yea, refined are many: and the wicked have done wickedly, and none of the wicked understand, and those acting wisely do understand;