The word "grind" can refer to the process of mechanically breaking down a substance into smaller pieces or a powder. It can also mean to work hard for a long time, often in a repetitive or tedious way. In a more informal context, "grind" might describe the daily effort someone puts into studying, working, or pursuing a goal that requires continuous focus and endurance.
The word "grind" comes from the Old English "grindan," which means "to crush" or "to grind." It is related to similar words in other Germanic languages, reflecting the long-standing use of the term in contexts dealing with crushing or breaking down substances.