Attach (a stamp, eg) (5)
I believe the answer is:
affix
(Other definitions for affix that I've seen before include "Fasten (to something)" , "Attach" , "Join" , "Glue" , "Stick on" .)
I believe the answer is:
affix
(Other definitions for affix that I've seen before include "Fasten (to something)" , "Attach" , "Join" , "Glue" , "Stick on" .)