Trace is a synonym of Describe. Describe is a synonym of Portray. Portray is related to Emphasis. 
Energy is related to Light. Light is related to Time. Time is the opposite of Era. 
Trace <--Synonym--> Describe <--Synonym--> Portray <--RelatedTo--> Emphasis 
Energy <--RelatedTo--> Light <--RelatedTo--> Time <--Antonym--> Era 