Unusual is similar to Unique. Unique is related to One. One is related to Stick. 
Hour is related to Limit. Limitation is derived from Limit. Freeze is a type of Limitation. Freeze is related to Snow. 
Unusual <--SimilarTo--> Unique <--RelatedTo--> One <--RelatedTo--> Stick 
Hour <--RelatedTo--> Limit <--DerivedFrom-- Limitation <--IsA-- Freeze <--RelatedTo--> Snow 