Assume is a synonym of Imply. Imply is a type of Have. Have is related to Feel. 
Interaction is related to Trade. Trade is related to Foreign. Foreign is the opposite of Indigenous. 
Assume <--Synonym--> Imply --IsA--> Have <--RelatedTo--> Feel 
Interaction <--RelatedTo--> Trade <--RelatedTo--> Foreign <--Antonym--> Indigenous 