Sorry is related to Excuse. Excuse is a synonym of Explain. Explain is related to Explanation. 
Post is a type of Record. Post is related to Send. Send is the opposite of Receive. Absorb is a type of Receive. 
Sorry <--RelatedTo--> Excuse <--Synonym--> Explain <--RelatedTo--> Explanation 
Record <--IsA-- Post <--RelatedTo--> Send <--Antonym--> Receive <--IsA-- Absorb 