Accrue over time (5)
I believe the answer is:
amass
(Other definitions for amass that I've seen before include "Collect or gather" , "Stockpile" , "Assemble" , "Gather together, pile up" , "Gather in great quantity" .)
I believe the answer is:
amass
(Other definitions for amass that I've seen before include "Collect or gather" , "Stockpile" , "Assemble" , "Gather together, pile up" , "Gather in great quantity" .)