Discourage is related to Punishment. Killing can cause/lead to Punishment. Killing is related to Stake. Stake is related to Ground. 
Skin is related to Pale. Pale is a different concept from Bright. Bright is a synonym of Encouraging. 
Discourage <--RelatedTo--> Punishment <--Causes-- Killing <--RelatedTo--> Stake <--RelatedTo--> Ground 
Skin <--RelatedTo--> Pale <--DistinctFrom--> Bright <--Synonym--> Encouraging 