Reasonable is etymologically related to Able. Reasonable is derived from Reason. Reason is a synonym of Conclude. Conclude is a synonym of Resolve. 
Sequence is a type of Repeat. Combination is a type of Sequence. Combination is a synonym of Blend. 
Able <--EtymologicallyRelatedTo-- Reasonable --DerivedFrom--> Reason <--Synonym--> Conclude <--Synonym--> Resolve 
Repeat <--IsA-- Sequence <--IsA-- Combination <--Synonym--> Blend 