Permanently (3,4)
'permanently' is the definition.
(synonyms)
This is all the clue.
(Other definitions for for good that I've seen before include "on the side of the angels" , "Permanently, always" , "Purpose of charitable work" , "Permanently - that's not bad" , "Informally, once and for all" .)
'permanently' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for always that I've seen before include "In perpetuity" , "Constantly" , "Perpetually" , "Eternally" , "Continually" .)