Speak is similar to Listen. Listen is a synonym of Agree. People can Agree. 
Ignore is the opposite of Recognize. Recognize entails/necessarily involves Perceive. Hurt is a type of Perceive. Hurt is related to Sad. 
Speak <--SimilarTo--> Listen <--Synonym--> Agree <--CapableOf-- People 
Ignore <--Antonym--> Recognize --Entails--> Perceive <--IsA-- Hurt <--RelatedTo--> Sad 