Proper is the opposite of Acceptable. Acceptable is a synonym of Cool. Cool is the opposite of Burn. 
Business is related to Negotiation. Negotiation is a type of Discussion. Discussion is derived from Discuss. 
Proper <--Antonym--> Acceptable <--Synonym--> Cool <--Antonym--> Burn 
Business <--RelatedTo--> Negotiation --IsA--> Discussion --DerivedFrom--> Discuss 