Comprise is etymologically related to Surprise. Surprise is related to Unexpected. Unexpected is the opposite of Expected. 
Calendar is related to Decade. Year is part of Decade. Year is related to Summer. Summer is related to Weather. 
Comprise --EtymologicallyRelatedTo--> Surprise <--RelatedTo--> Unexpected <--Antonym--> Expected 
Calendar <--RelatedTo--> Decade <--PartOf-- Year <--RelatedTo--> Summer <--RelatedTo--> Weather 