'Board' in the Bible

Certainly black cumin is not threshedwith a threshing board,and a cart wheel is not rolled over the cumin.But black cumin is beaten out with a stick,and cumin with a rod.

See, I will make you into a sharp threshing board,new, with many teeth.You will thresh mountains and pulverize themand make hills into chaff.

Your wealth, merchandise, and goods,your sailors and captains,those who repair your leaks,those who barter for your goods,and all the warriors within you,with all the other people on board,sink into the heart of the seaon the day of your downfall.