Shomer is the Hebrew participle meaning keeper, watchman, guardian, one who stands watch. The root שמר carries an obligation: a shomer is not simply watching, but watching on behalf of someone to whom he is bound. Psalm 121 presses the word into covenant weight. YHWH is ha-shomer Yisrael, "the Keeper of Israel," and the psalm insists, hinneh lo yanum v'lo yishan shomer Yisrael, "behold, the Keeper of Israel neither slumbers nor sleeps."

This is not Lord. This is Keeper. The one whose eye is on you because He has bound Himself to you. The English Bible has collapsed shomer into Lord across most translations, even though the two words do completely different work in the Hebrew. Adon names a position of authority. Shomer names a covenant posture. When you pray to YHWH as shomer, you are not petitioning a distant authority for attention. You are speaking to the One whose eye has been on you since before you knew your own name. The posture of prayer shifts.