Wire is related to Necessity. Necessity is related to Slope. Slope is related to Surface. 
Physical is the opposite of Mental. Mental is related to Psychologist. Psychologist is related to Specialist. 
Wire <--RelatedTo--> Necessity <--RelatedTo--> Slope <--RelatedTo--> Surface 
Physical <--Antonym--> Mental <--RelatedTo--> Psychologist <--RelatedTo--> Specialist 