Fellow is related to Happy. Happy is the opposite of Unhappy. 
Shake is related to Fast. Fast is related to Horse. Horse is related to Leg. Leg is related to Elbow. 
Fellow <--RelatedTo--> Happy <--Antonym--> Unhappy 
Shake <--RelatedTo--> Fast <--RelatedTo--> Horse <--RelatedTo--> Leg <--RelatedTo--> Elbow 