"ruggedest" in the adjective sense
1. rugged
sturdy and strong in constitution or construction enduring
"with a house full of boys you have to have rugged furniture"
2. furrowed, rugged
having long narrow shallow depressions (as grooves or wrinkles) in the surface
"furrowed fields"
"his furrowed face lit by a warming smile"
3. broken, rugged
topographically very uneven
"broken terrain"
"rugged ground"
4. rugged, tough
very difficult severely testing stamina or resolution
"a rugged competitive examination"
"the rugged conditions of frontier life"
"the competition was tough"
"it's a tough life"
"it was a tough job"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License