"It doesn't ___ up" (3)
I believe the answer is:
add
(Other definitions for add that I've seen before include "Determine the sum of" , "Count up" , "Put together - attach" , "Sum, put together" , "Total; put together" .)
I believe the answer is:
add
(Other definitions for add that I've seen before include "Determine the sum of" , "Count up" , "Put together - attach" , "Sum, put together" , "Total; put together" .)