'Understand' in the Bible

Teach me, and I will hold my tongue: and cause me to understand wherein I have erred.

I would know the words which he would answer me, and understand what he would say unto me.

Lo, these are parts of his ways: but how little a portion is heard of him? but the thunder of his power who can understand?

Great men are not always wise: neither do the aged understand judgment.

Also can any understand the spreadings of the clouds, or the noise of his tabernacle?