For the Lord giveth wisdom: out of his mouth cometh knowledge and understanding.
For the Lord "GIVES" Webster says this about GIVE "The sense of give is generally to pass, or to transfer, that is, to send or throw.]"
For God so loved the world that He GAVE His only begotten Son (transfer His Son from Heaven to Earth) that whosoever believes in Him (put trust and confidence in) should not perish (be destroyed) but have everlasting life. (Never die, never be destroyed)
He "GIVES" WISDOM "The right use or exercise of knowledge;"
Here we are being taught that the Lord gives the right to exercise knowledge. How? James says if you want WISDOM ask God for it.
If any of you lack wisdom, let him ask of God, that giveth to all men liberally, and upbraideth not; and it shall be given him.
We become knowledgeable as we study God's Word. But understanding comes by knowing God and doing what He says. There was a saying going around in 90's "What Would Jesus Do!" The only way someone would know what someone else would do would be to know that person really well. If I were asked what my wife would do in a certain matter I would be able to say "she would do this or that." I could do that because I know her and spend time with her in other words I spend time building a relationship with her. If I wasn't sure I could just ask her. Same with the Lord if I don't know just ask Him "out of his mouth cometh knowledge and understanding."