C2 adjective, noun /ˈɡreɪtɪŋ/
grating
unangenehmer Klang / Metallgitter
Meaning
Harsh and unpleasant to the senses, especially sound; a framework of bars covering an opening.
Example
The teacher's grating voice made it hard to concentrate.
Die unangenehme Stimme des Lehrers machte es schwer, sich zu konzentrieren.