The Hebrew word eden (אֶדֶן, not to be confused with the Garden of Eden) refers to a base, socket, or pedestal — specifically the silver sockets into which the tabernacle's upright boards were set. Each socket weighed a talent of silver.
The silver adenim (plural) of the tabernacle were cast from the ransom money collected from Israel's census — half a shekel per person (Exodus 30:11-16). This transformed the nation's redemption payment into the very foundation of God's dwelling place among them. Theologically, it pictures how the atonement price paid for God's people becomes the foundation on which His presence rests with them. The silver base beneath the tabernacle thus whispers of Christ, whose ransom price forms the foundation of the church.