Forsake, leave behind (7)
I believe the answer is:
abandon
I believe this is a double definition.
'forsake' is the first definition.
(synonyms)
'leave behind' is the second definition.
(abandoning is a kind of leaving behind)
(Other definitions for abandon that I've seen before include "Leave (a place) for ever" , "Desert or yield without restraint" , "Leave, desert" , "Czech city" , "Desert; give up (action)" .)