grating

Short definition from Wiktionary

Adjective

1. 1
   Harsh and unpleasant.
2. 2
   Abrasive; tending to annoy.

Noun

1. 1
   A barrier that has parallel or crossed bars blocking a passage but admitting air.
2. 2
   A frame of iron bars to hold a fire.
3. 3
   The loose material that comes from something being grated.
4. 4
   An optical system of close equidistant and parallel lines or bars, especially lines ruled on a polished surface, used for producing spectra by diffraction.
5. 5
   The strong wooden lattice used to cover a hatch, admitting light and air; also, a movable lattice used for the flooring of boats.
6. 6
   The sound made by something that grates against something else.

Verb

1. 1
   present participle and gerund of grate