1. superlative form of rough: having the most uneven or irregular surface
2. superlative form of rough: most violent, harsh, or difficult
3. superlative form of rough: most approximate or imprecise

Examples

• This is the roughest road I’ve ever driven on.
• The ocean was at its roughest during the storm.
• That was the roughest game of the season.
• He grew up in the roughest neighborhood in the city.
• This is just the roughest estimate of the costs.
• The sandpaper has the roughest texture of all the grades.
• The team faced their roughest challenge yet.