Hand-moving "Hello!" (4)
I believe the answer is:
wave
(Other definitions for wave that I've seen before include "Greeting; undulation" , "Undulating curve" , "Roller; a gesture" , "may have a crest at the top?" , "roller, perhaps" .)
I believe the answer is:
wave
(Other definitions for wave that I've seen before include "Greeting; undulation" , "Undulating curve" , "Roller; a gesture" , "may have a crest at the top?" , "roller, perhaps" .)