Might is a different concept from Weak. Weak is a synonym of Simple. 
you are likely to find Sex in/at/on Bedroom. Bedroom is the opposite of Living. Living is related to Branch. Branch is related to Root. 
Might <--DistinctFrom--> Weak <--Synonym--> Simple 
Sex --AtLocation--> Bedroom <--Antonym--> Living <--RelatedTo--> Branch <--RelatedTo--> Root 