The word "piggishnesses" is already a plural version of the noun "piggishness," which means the qualities or behavior of a pig, such as greediness, gluttony, and selfishness. However, if we are to look for antonyms or words that have the opposite meaning of piggishness, we can use terms like generosity, selflessness, and kindness. These words connote traits of people who are considerate of others, who share without expecting something in return, and who put the welfare of others before themselves. Thus, by cultivating these positive attributes, we can avoid exhibiting piggishness and become better individuals who contribute positively to society.