Where does “tabernāculum” come from?

tabernāculum (Latin) comes from Latin taberna, from Latin trabs, from Indo-European *treb-.

Ancestry of “tabernāculum”, step by step

Step	Language	Word	Meaning
1	Latin	taberna	shop, store; inn; tavern, saloon
2	Latin	trabs	timber, beam, rafter; tree trunk; penis
3	Indo-European	*treb-	—