Term is related to Weather. Weather is related to State. State is related to Ready. Ready is related to Complete. 
Likely is the opposite of Impossible. Impossible is related to Possible. Possible is the opposite of Unlikely. Unlikely is similar to Remote. 
Term <--RelatedTo--> Weather <--RelatedTo--> State <--RelatedTo--> Ready <--RelatedTo--> Complete 
Likely <--Antonym--> Impossible <--RelatedTo--> Possible <--Antonym--> Unlikely <--SimilarTo--> Remote 