Threaten is derived from Threat. Threat is related to Danger. Danger is related to Fear. 
Ladder is related to Slope. Slope is related to Condition. Condition is related to Bottle. Bottle is a type of Container. 
Threaten --DerivedFrom--> Threat <--RelatedTo--> Danger <--RelatedTo--> Fear 
Ladder <--RelatedTo--> Slope <--RelatedTo--> Condition <--RelatedTo--> Bottle --IsA--> Container 