Regret is related to Would. Would is the opposite of Could. Could is related to Ability. 
Judicial is related to Trial. Trial is related to Event. Event is related to Election. 
Regret <--RelatedTo--> Would <--Antonym--> Could <--RelatedTo--> Ability 
Judicial <--RelatedTo--> Trial <--RelatedTo--> Event <--RelatedTo--> Election 