1. (

• huskiness ,
• ruggedness ,
• toughness

) the property of being big and strong ;

2. (

• ruggedness ,

) the quality of being topologically uneven; "the ruggedness of the mountains" ;

3. (

• hardness ,
• ruggedness ,

) the quality of being difficult to do; "he assigned a series of problems of increasing hardness"; "the ruggedness of his exams caused half the class to fail" ;