grating

/ˈgrā-tiŋ/

noun

  1. a wooden or metal lattice used to close or floor an opening

  2. a partition, covering, or frame of parallel bars or crossbars

  3. a system of close equidistant and parallel lines or bars ruled on a polished surface to produce spectra by diffraction

adjective

  1. causing irritation or annoyance; often : having a harsh or unpleasant sound

a grating habit

verb

  1. to furnish with a grate

the lower windows were grated