Slight is the opposite of Value. Value is the opposite of Cheap. Cheap is the opposite of Dear. Dear is related to Costly. 
Motion is the opposite of Standing. Standing is related to Represent. Represent is a synonym of Defend. Defend is a type of Prevent. 
Slight <--Antonym--> Value <--Antonym--> Cheap <--Antonym--> Dear <--RelatedTo--> Costly 
Motion <--Antonym--> Standing <--RelatedTo--> Represent <--Synonym--> Defend --IsA--> Prevent 