grates is a form of:

Grate



noun
1.
(To grunt in to particles by scraping, to grind [the teeth], to cause irritation) សូរង៉េតង៉តដោយសង្កៀត, ប្រទាស
verbpast tense: grated ; past participle: grated ; present participle: grating ;
1.
(TRANSITIVE) ~ something (into something) (to rub or scrape into small bits. sound harshly, to irritate) grate a coconut កោស, grate the teeth សង្កៀត (ធ្មេញ)
2.
(INTRANSITIVE) លាន់សូរង៉េតង៉ត, សង្កៀត
ENGLISH MEANING
noun
1.
A structure or frame containing parallel or crosed bars, with interstices; a kind of latticework, such as is used ia the windows of prisons and cloisters.
2.
A frame or bed, or kind of basket, of iron bars, for holding fuel while burning.
adjective
1.
Serving to gratify; agreeable.
verbpast tense: grated ; past participle: grated ; present participle: grating ;
1.
(TRANSITIVE) To furnish with grates; to protect with a grating or crossbars; as, to grate a window.
2.
(TRANSITIVE) To rub roughly or harshly, as one body against another, causing a harsh sound; as, to grate the teeth; to produce (a harsh sound) by rubbing.
3.
(TRANSITIVE) To reduce to small particles by rubbing with anything rough or indented; as, to grate a nutmeg.
4.
(TRANSITIVE) To fret; to irritate; to offend.
5.
(INTRANSITIVE) To make a harsh sound by friction.
6.
(INTRANSITIVE) To produce the effect of rubbing with a hard rough material; to cause wearing, tearing, or bruising. Hence; To produce exasperation, soreness, or grief; to offend by oppression or importunity.