Activity is a different concept from Rest. Rest is related to Regain. Regain is a synonym of Recover. Recovery is derived from Recover. 
Wet is related to Paint. Paint is the opposite of Pencil. 
Activity <--DistinctFrom--> Rest <--RelatedTo--> Regain <--Synonym--> Recover <--DerivedFrom-- Recovery 
Wet <--RelatedTo--> Paint <--Antonym--> Pencil 