Father is related to Dear. Dear is related to Lovely. Lovely is etymologically related to Love. you are likely to find Love in/at/on Dinner. 
Necessity is a synonym of Essential. Essential is a synonym of Critical. Critical is a synonym of Crucial. 
Father <--RelatedTo--> Dear <--RelatedTo--> Lovely --EtymologicallyRelatedTo--> Love --AtLocation--> Dinner 
Necessity <--Synonym--> Essential <--Synonym--> Critical <--Synonym--> Crucial 