Choose the most appropriate ANTONYM of the given word.

ROUGH

Smooth 

The most appropriate antonym of the word rough is smooth.

• Rough means "having an uneven or irregular surface."
• Smooth means "having a surface that is free from irregularities."

The other words do not have the same meaning as smooth.

• Comprehensive means "including or dealing with a wide range of things."
• Infection means "the introduction of harmful germs into the body."
• Contagion means "the spread of a disease from one person to another."