a length of timber that bears weight: the pole two people carry a load on, and the crossbar of a yoke laid over a neck
This is a plain piece of wood, and it is named for how such a piece of wood behaves. Hang a load in the middle of a pole and rest the ends on two sets of shoulders, and it springs and sways with every step. That springing is where the word comes from, and the picture stays close to the surface everywhere it turns up.
One object, three very different loads:
- the wrapped equipment of the sanctuary, lashed on for the march
- a single cluster of grapes too heavy for one man to carry back
- the bar across the neck of a conquered people
The carrying pole is not the same thing as the permanent staves that stayed in the rings of the ark and the table (בַּד). Those were made for their furniture and never taken out. This is the ordinary pole, brought out for covered bundles, and the account of who carried what keeps the two straight.
The last use turns the pole over onto a person. A yoke was not one solid piece: a stiff bar lay across the neck and cords held it in place underneath. This word names the bar, not the whole rig (עֹל) and not the ties (מוֹסֵר). Nahum promises that God will break the bar off Judah's neck and snap the cords, which is the Bible's standard way of announcing the end of forced service. The longer form of this same word (מוֹטָה) is what the prophets reach for again and again when they say it; this shorter form says it once.