Usual is a synonym of Plain. Plain is the opposite of Slope. Slope is a different concept from Steep. Steep is a type of Concentrate. 
Begin is a type of Talk. Talk is a type of Discussion. Discussion is related to Interview. Interview is related to Employer. 
Usual <--Synonym--> Plain <--Antonym--> Slope <--DistinctFrom--> Steep --IsA--> Concentrate 
Begin --IsA--> Talk --IsA--> Discussion <--RelatedTo--> Interview <--RelatedTo--> Employer 