Adorn, decorate (8)
I believe the answer is:
beautify
I believe this is a double definition.
'adorn' is the first definition.
(I know that adorn can be written as beautify)
'decorate' is the second definition.
(I know that decorate can be written as beautify)
(Other definitions for beautify that I've seen before include "Make more pretty" , "Make prettier" , "Enhance appearance" , "Make lovely" .)