Smooth, velvety (4)
I believe the answer is:
soft
I believe this is a double definition.
'smooth' is the first definition.
(thesaurus)
'velvety' is the second definition.
(similar in meaning)
(Other definitions for soft that I've seen before include "Not hard, rough or harsh" , "Easily yielding to pressure" , "Velvety" , "Subdued - gentle" , "(Of drink) not alcoholic" .)