Terrible is a synonym of Severe. Severe is similar to Bad. Bad is the opposite of Ok. 
Deep is related to Forest. you are likely to find Stick in/at/on Forest. Stick is related to Sharp. Sharp is a synonym of Brilliant. 
Terrible <--Synonym--> Severe <--SimilarTo--> Bad <--Antonym--> Ok 
Deep <--RelatedTo--> Forest <--AtLocation-- Stick <--RelatedTo--> Sharp <--Synonym--> Brilliant 