Nuach (נוּחַ) means to rest, to settle down, to be still, or to cause something to rest. It appears over 70 times and is fundamental to the biblical theology of rest (menucha). From the Sabbath rest of creation to the promised land as a place of rest to the eschatological rest of Hebrews — nuach traces the entire redemptive arc. Notably, Noah's name is derived from this root, as is the ark's 'resting' on Ararat.
Nuach operates on multiple levels: (1) physical rest — the ark rests on a mountain; (2) territorial rest — Israel's victory gives the land rest; (3) spiritual rest — the Spirit rests upon Messiah (Isaiah 11:2); (4) eschatological rest — Hebrews 4 promises a Sabbath rest for God's people. All forms point to the ultimate rest found in Christ: 'Come to me... and I will give you rest' (Matthew 11:28).
The ark's nuach on Ararat after the flood is a preview of salvation's rest. Noah (Noach, from nuach) himself was a type of Christ — the one through whom God's people find rest and new creation begins. When the Spirit 'rests' on Jesus at His baptism (Matthew 3:16, using the same imagery), it echoes Isaiah 11:2 and signals that the true Rest-Giver has arrived.