the GNU version of the Collaborative International Dictionary of English
v. To make smooth.
The Century Dictionary and Cyclopedia
To make smooth; smooth.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
v. become smooth
v. make smooth or smoother, as if by rubbing
v. make (a surface) shine
Word Usage
"The External Affairs Minister also made it clear that anti-India tirade by Hafeez Saeed and other Jihadi leaders would not not "smoothen" Indo-Pak ties."