Big is related to Very. Very is related to Fit. Fit is a synonym of Spell. 
Person does not want (to) Crowded. Person does not want (to) Rain. Rain is a different concept from Sunny. 
Big <--RelatedTo--> Very <--RelatedTo--> Fit <--Synonym--> Spell 
Crowded <--NotDesires-- Person --NotDesires--> Rain <--DistinctFrom--> Sunny 