Page is related to Slice. Slice is related to Serving. Serving is related to Rule. 
Retain is the opposite of Slip. Slip is related to Lose. Lose is related to Fail. 
Page <--RelatedTo--> Slice <--RelatedTo--> Serving <--RelatedTo--> Rule 
Retain <--Antonym--> Slip <--RelatedTo--> Lose <--RelatedTo--> Fail 