(v.) = moler, triturar. Ex: The green wheels are normally silicon carbide, and used for grinding brasses, carbides, and other extremely hard materials. * grind on = avanzar a trancas y barrancas, avanzar con gran dificultad, avanzar a duras penas, andar a trancas y barrancas. * grind on + Posesivo + nerves = enervar, exasperar, sacar de quicio. * grind + Posesivo + teeth = rechinar los dientes.