A. delicate
B. coarse
C. tough
D. timid
Rugged : strongly made and capable of withstanding rough handling.
Delicate : easily broken or damaged; fragile.
Coarse : rough or harsh in texture.
Tough : (of a substance or object) strong enough to withstand adverse conditions or rough handling.
Timid : showing a lack of courage or confidence; easily frightened.
Antonym of Rugged is Delicate
