Evil is related to Offensive. Offensive is related to Hostile. Hostile is a different concept from Friendly. 
Weaken is a type of Change. Weaken is a synonym of Reduce. Reduce is related to Minimize. 
Evil <--RelatedTo--> Offensive <--RelatedTo--> Hostile <--DistinctFrom--> Friendly 
Change <--IsA-- Weaken <--Synonym--> Reduce <--RelatedTo--> Minimize 