(adjective)
strong and robust in build or construction;
e.g. They wore rugged boots when hiking in the mountains.
(adjective)
having the appearance of strength and/or some roughness in facial features, possibly with furrows/wrinkles, often considered attractive;
e.g. He had a rugged and handsome face.
(adjective)
requiring strength, stamina/toughness, ability, or determination;
e.g. He asked if we would be capable of the rugged journey.
(adjective)
somewhat rough in character, either in terms of being rude and having coarse manners, or in terms of being stern and austeure;
e.g. She was a rugged and unfriendly old woman.