Mix is a type of Compound. Compound is related to Rough. Rough is a different concept from Gentle. 
Mom can be Pretty. Pretty is etymologically related to Cute. Cute is a synonym of Hot. 
Mix --IsA--> Compound <--RelatedTo--> Rough <--DistinctFrom--> Gentle 
Mom --HasProperty--> Pretty --EtymologicallyRelatedTo--> Cute <--Synonym--> Hot 