Promise is etymologically related to Permit. Promise is related to Swear. 
Weigh is related to Assess. Assess is a synonym of Evaluate. Evaluate is derived from Evaluation. Evaluation is related to Health. 
Permit <--EtymologicallyRelatedTo-- Promise <--RelatedTo--> Swear 
Weigh <--RelatedTo--> Assess <--Synonym--> Evaluate --DerivedFrom--> Evaluation <--RelatedTo--> Health 