Part is related to Bottom. you are likely to find Bottom in/at/on Water. 
Take is related to Removal. Withdrawal is a type of Removal. Retreat is a type of Withdrawal. Retreat is a synonym of Withdraw. 
Part <--RelatedTo--> Bottom --AtLocation--> Water 
Take <--RelatedTo--> Removal <--IsA-- Withdrawal <--IsA-- Retreat <--Synonym--> Withdraw 