rugged -
sturdy and strong in constitution or construction; enduring; "with a house full of boys you have to have rugged furniture"
delicate exquisitely fine and subtle and pleasing; susceptible to injury; "a delicate violin passage"; "delicate china"; "a delicate flavor"; "the delicate wing of a butterfly"
strength the property of being physically or mentally strong; "fatigue sapped his strength"
knockabout suitable for rough use; "a knockabout overcoat"; "a knockabout old car"
rugged -
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"
difficult,
hard not easy; requiring great physical or mental effort to accomplish or comprehend or endure; "a difficult task"; "nesting places on the cliffs are difficult of access"; "difficult times"; "why is it so hard for you to keep a secret?"
rugged -
having long narrow shallow depressions (as grooves or wrinkles) in the surface; "furrowed fields"; "his furrowed face lit by a warming smile"
