Definition of rough-grind in US English:

rough-grind

verb

  • with object To grind roughly, or so as to leave an unsmoothed or uneven surface.

Origin

Mid 17th century; earliest use found in Nathaniel Ingelo (d. 1683), author. From rough + grind.

Pronunciation

rough-grind

/ˈrʌfɡrʌɪnd/