The Spanish for “obstacle”, traba, comes from the Latin trabis, meaning… “wood”.
The same Latin room, trabis, evolved in Latin to mean “timber or a beam of wood” and from there, over time, evolved into the English (via French) tavern. What is a tavern if not an old wooden house?
So next time you’re drinking in a tavern, remember that the tavern is an obstacle to your productivity! But that’s not necessarily a bad thing.