Spell 'Assuage' (7)
I believe the answer is:
relieve
I believe this is a double definition.
'spell' is the first definition.
(thesaurus)
'assuage' is the second definition.
('relieve' can be a synonym of 'assuage')
(Other definitions for relieve that I've seen before include "Alleviate pain or stress" , "Alleviate 9pain)" , "Assuage - take over duty from" , "raise a siege" , "help" .)