Meaning and Derivation: Meaning and Derivation: Jehovah is translated as "The Existing One" or "Lord." The chief meaning of Jehovah is derived from the Hebrew word Havah meaning "to be" or "to exist." It also suggests "to become" or specifically "to become known" - this denotes a God who reveals Himself unceasingly. Shalom is a derivative of shâlêm (which means "be complete" or "sound") Shalom is translated as "peace" or "absence from strife." Jehovah-Shalom is the name of an altar built by Gideon in Ophrah. [From BlueLetterBible]

I find it interesting that though Jehovah Shalom is used only once in the bible, the word peace is noted over 400 times in the Bible. It's main use is stating how God is the ultimate source for peace, He provides it freely and it is beyond all of that which the world can offer.

Peace I leave with you; my peace I give you. I do not give to you as the world gives. Do not let your hearts be troubled and do not be afraid.
John 14:27

I have had many a conversation with people who have suffered/are suffering with depression, and although I have no "scientific proof"  other than the course of their lives (or unfortunate lack thereof) the ones that are better overall are the ones who turn to God when contrary thoughts enter their mind. They are the ones who seek His peace in the midst of clouded thoughts that they would be "better off dead" and cling to the truth that they have a purpose greater than what some echo is resonating through their  cerebrum. A wise note that I have taken from one of these children of God is to immerse myself in scripture for whatever is disturbing my peace at the moment. Anyone who follows me on Pinterest can attest that from time to time there will be an onslaught of verses all pertaining to a particular topic, whether it being kind to people who mistreat you (aka loving your enemies), loneliness, seeking God, trusting God, heartache, etc.

All Scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness, that the man of God may be complete, thoroughly equipped for every good work.
2 Timothy 3:16-17

Use it peoples! Let us know just sit and wallow, but rather read it + trust it + claim it + live it + share it!

"I have told you these things, so that in me you may have peace. In this world you will have trouble. But take heart! I have overcome the world."
John 16:33

Grace and peace be yours in abundance through the knowledge of God and of Jesus our Lord.
2 Peter 1:2