Grate

grat, v. t. To rub roughly or harshly, as one body against another; to wear" away in small particles, by rubbing with anything rough; to fret, vex, irritate. — v. i. To rubhard, so as to offend; make a harsh sound by friction of rough bodies. — Grafer, re. One who, or that which, etc.; esp. instrument for rubbing off small particles of a body. — Grating, n. A harsh sound of rubbing.