1 make or become coarse or coarser; "coarsen the surface"; "Their minds coarsened"
2 make less subtle or refined; "coarsen one's ideals"
- To make more coarse.
- Because the wool is poor quality it will coarsen the fabric.
adulterate, alloy, boss, brutify, canker, carnalize, cheapen, confound, contaminate, corrupt, debase, debauch, defile, deflower, degenerate, degrade, denature, deprave, desecrate, despoil, devalue, distort, gnarl, grain, granulate, horripilate, infect, knob, misuse, pervert, pimple, poison, pollute, popularize, prostitute, ravage, ravish, rough, rough up, roughen, smooth, stud, taint, tooth, twist, ulcerate, violate, vitiate, vulgarize, warp