grating
grat-ing
noun
A framework of parallel or crossed bars, typically covering an opening.
"The drain had a metal grating."
adjective
Sound that is harsh, unpleasant, and irritating to the ear.
"Her grating voice annoyed everyone."
Thesaurus
Synonyms: grate, scratchy, raspy, rasping, gravelly, cacophonous, cacophonic, rough, diffraction grating