Apparently from an unused root meaning to cover; a veil: - vail.
Verse
Matrix
Exo 17:7And he called the name of the place MassahH4532, and Meribah, because of the chiding of the children of Israel, and because they tempted the LORD, saying, Is the LORD among us, or not? ▼▼
Deu 33:8¶ And of Levi he said, Let thy Thummim and thy Urim be with thy holy one, whom thou didst prove at MassahH4532, and with whom thou didst strive at the waters of Meribah;